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This course is designed to utilize the advantages of the free software OpenFOAM and the characteristics of open source, aiming to acquire the knowledge and skills necessary for proper analysis settings. The two-day specialized course "Turbulent Analysis with Convection Heat Transfer" will explain the overview of the OpenFOAM library and describe how to write input files. Participants will also learn the series of OpenFOAM operation procedures from mesh creation to computation execution and result visualization using ParaView. We will explain the governing equations of the solver, the types and contents of files, and learn programming using container classes and dictionary classes that have similar functions to user functions of commercial solvers, aiming to develop technical skills in OpenFOAM. ■ Date and Time August 22, 2023 (Tuesday) and August 23, 2023 (Wednesday) for two days Both days from 10:30 AM to 12:00 PM and from 1:00 PM to 5:00 PM ■ Venue Tokyo Classroom (Terabyte Seminar Room) 5th Floor, NOV Building, 3-10-7 Yushima, Bunkyo-ku, Tokyo 113-0034 *For more details, please refer to the related links or feel free to contact us.

• Technical Seminar

■OpenFOAM Engineer Training Course - Two-Day Specialized Course: "Turbulence Analysis with Convection Heat Transfer" This is the highest-level course in our OpenFOAM training program. The content is structured according to the book "OpenFOAM Library Reference," and participants will receive instruction from the author. - One-Day Intensive Course: "Mixing Analysis" A popular educational course series taught by our OpenFOAM specialist consultants. - One-Day Intensive Course: "Natural Convection Analysis" In the one-day intensive course "Natural Convection Analysis," participants will learn the execution procedures for indoor thermal fluid analysis. - One-Day Intensive Course: "Erosion Analysis" In the one-day intensive course "Erosion Analysis," participants will model the erosion phenomenon where sand near bridge piers is excavated by water flow and learn the procedures for coupled analysis using DEM and fluid dynamics. - [Free Trial Course] Basic Course 1 (Hands-on Practice) We will hold a free trial course in a classroom format for those who want to experience the content of our paid courses. - [Free Trial Course] Basic Course 2 (Online) We will hold a free trial course in an online format for those who want to experience the content of our paid courses. *For more details, please check the PDF download.

• Technical Seminar

This is an introduction to a case study conducted using the chtMultiRegionFoam solver for thermal fluid analysis of a casing, including heat conduction within solids. Eight solid materials were defined, with one inlet and one outlet set up, and a porous body defined at the inlet. Four cases were calculated: in cases 1-1 to 1-3, a velocity was defined at the outlet to check the airflow resistance (system impedance), and in case 2, a fan model was set up based on P-Q characteristics for the calculation. [Case Overview] ■ By executing multiple patterns of calculations with a specified flow rate at the outlet, it is possible to investigate airflow resistance (system impedance). ■ By defining P-Q characteristics at the outlet, thermal fluid analysis can be performed at the operating point of the fan. *For more details, please refer to the related links or feel free to contact us.

• Thermo-fluid analysis

In the molding process of resin products, the stirring process to uniformly mix multiple materials is important for both molding defects and quality. In the case of thermosetting resin materials (base agent and hardener), calculations considering the spread of each material and the curing reaction during stirring are necessary. Therefore, we customized the interFoam solver and developed a solver that takes into account the concentration changes of the base agent and hardener during stirring, as well as the curing reaction. 【Case Overview】 ■ Confirm the distribution and progress of the reaction rate in the stirring tank ■ Identify areas where the base agent tends to remain without reacting ■ Can be used to examine ideal stirring conditions such as wing shape, rotation speed, and the presence or absence of baffles *For more details, please refer to the related links or feel free to contact us.

• Resin processing machine

We would like to introduce the "Barracuda Virtual Reactor" that we handle. This is a CAE software that simulates the three-dimensional transient phenomena of multiphase flow, thermodynamics, and chemical reactions occurring inside industrial equipment equipped with fluid-particle systems, such as fluidized bed reactors, at a practical scale. It faithfully reproduces physical phenomena and reduces risks associated with industrial process design, scale-up, product development, and troubleshooting in various fields. 【Features】 ■ Powerful yet simple ■ A tool with high business value ■ Complements other tools ■ Best-in-class support *For more details, please refer to the PDF document or feel free to contact us.

• Thermo-fluid analysis

The expression of the relaxation modulus differs between the field of structural analysis, which considers the contribution of viscosity to elastic bodies, and the field of resin flow analysis, which considers the contribution of elasticity to viscous bodies. In the field of structural analysis, there is a spring-only element that represents pure elastic properties, alongside a two-element Maxwell model arranged in parallel. This article introduces an example of replacing frequency-dependent characteristic values obtained from a dynamic viscoelastic device with a generalized model. For more details, please refer to the related links below, and we encourage you to read them. [Contents] ■ Examples of frequency-dependent properties of resins ■ Conversion formulas to the generalized Maxwell model ■ Determination of the values of the relaxation spectrum *For more information, please refer to the related links or feel free to contact us.

• Other analyses

GUI-FOAM is an intuitive GUI software that can be operated easily. Explanations and hints are displayed throughout the screen, and help and tutorials can be easily accessed via a browser. When you input analysis conditions, a list of solvers suitable for your purpose is displayed, and you can specify the version of OpenFOAM for the input files to be generated. 【Features】 - By following the GUI settings, appropriate input files can be created. - Solvers, models, and configuration items can be selected from a list. - Function table settings can be visually confirmed with 2D graphs. - Boundary conditions can be set while checking the mesh boundaries, among others. OpenFOAM is a license-free software with features comparable to commercial CFD software, but the lack of official documentation and GUI is undeniable. Our company has published a practical guide titled "OpenFOAM Library Reference" as an alternative to the official documentation, and we are developing a GUI that reflects the content of the guide to improve the OpenFOAM analysis environment and enhance usability. *For more details, please refer to the related links or feel free to contact us.

• Analysis Services

The software "GUI-FOAM" that we handle makes various calculation settings easier. "OpenFOAM" has numerous solvers, and it is necessary to choose one that matches the calculations you want to perform. This product presents suitable solver candidates by specifying the characteristics of the calculations (steady or unsteady, compressible or incompressible fluid, etc.). Additionally, you can check the mesh surface through a 3D view screen, making the input file settings easier. 【Features】 ■ Solver Selection - By specifying the characteristics of the calculations to be performed, suitable solver candidates are presented. - Descriptions of the solvers are also displayed. - Users can easily select a solver by reading the descriptions from the candidates. *For more details, please refer to the related links or feel free to contact us.

• Software (middle, driver, security, etc.)

"GUI-FOAM" is software for creating input files for "OpenFOAM" (produced by OpenFOAM Foundation Ltd.). Instead of creating input files with an editor, this software allows you to configure input files using a GUI (Graphical User Interface). Please feel free to contact us if you have any inquiries. 【Features】 ■ Creates input files (excluding mesh-related files) ■ Allows configuration of input files using a GUI (Graphical User Interface) *For more details, please refer to the related links or feel free to contact us.

• Software (middle, driver, security, etc.)

By utilizing the magnetic field analysis function available from LS-DYNA Ver.R7, it is possible to conduct a magnetic field-thermal-structural coupled analysis considering large deformations of coils using only "LS-DYNA." The coil in this case study is made of copper, and calculations were performed up to 3 microseconds. In the analysis, the electrical conductivity of copper is approximated using the Burgess model, which takes into account the electrical conductivity of copper in both solid and liquid states as implemented in this product. 【Case Overview】 ■ Magnetic field generated at the center of the coil - The analysis results align well with the experimental results. - It is evident that LS-DYNA's magnetic field-thermal-structural coupled analysis is highly accurate. ■ Deformation process of the coil and temperature distribution - There are areas that significantly exceed the melting point of copper (1358K), but in the analysis, these are considered in a liquid state, and the electrical conductivity in that state is taken into account. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

Here is an example of ultra-high magnetic field generation analysis. By utilizing the magnetic field analysis function available from LS-DYNA Ver.R7, it is possible to conduct a magnetic field-thermal-structural coupled analysis considering large deformations of the coil using only "LS-DYNA." In the comparison of analysis results and experimental results for high magnetic field generation and coil shapes, the analysis captures the trends of the experimental results well, and the compression shape of the coil, which appears to "converge," is reproduced. 【Roles of Each Component in Electromagnetic Concentration Method】 ■ Liner Coil: Generates ultra-high magnetic fields ■ Primary Coil: Generates a magnetic field to compress the liner coil ■ Support Coil: Provides inertial mass and stiffness to the primary coil ■ Helmholtz Coil: Generates a seed magnetic field (external field) inside the liner coil, which is "concentrated" and becomes part of the ultra-high magnetic field *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

In the analysis model of Case 2 for the "Water-filled Bottle Drop Analysis using ALE and S-ALE," we will introduce a case that utilized the mesh trimming function. In version R11.0.0, the computation time has decreased by approximately 10% compared to R10.1.0, and by using the mesh trimming function, it has further decreased by about 35%. It is expected that the computation time can be significantly reduced without having a major impact on the results. 【Analysis Results】 ■ In R11.0.0, the computation time has decreased by approximately 10% compared to R10.1.0, and by using the mesh trimming function, it has further decreased by about 35%. ■ There are no significant differences in behavior or leakage amounts due to version differences or the use of the trimming function. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

This presentation introduces a case study of fluid-structure interaction analysis using the ALE method in "LS-DYNA," focusing on the drop analysis of a water-filled bottle. In addition to the conventional ALE method, analyses were conducted using the Structured-ALE (S-ALE) available from Ver.R9 and the automatic conversion function from the ALE model to the S-ALE model available from Ver.R10. Results comparing behavior and computation time are presented. When comparing Case 1 and Case 2, as well as Case 3 and Case 4, it is confirmed that the S-ALE exhibits behavior nearly identical to that of the conventional ALE while also reducing computation time. 【Model Overview】 - A water-filled bottle is placed at a 5-degree tilt on a horizontal rigid floor. - Initial velocity of 4,000 mm/s and gravitational acceleration are applied to the entire model for the drop analysis. *For more details, please refer to the related links or feel free to contact us.*

• Structural Analysis

The analysis is conducted up to 0.005 seconds, during which average pressure occurs on the side walls and floor, using the BOUNDARY_AMBIENT_EOS function to control the pressure boundary conditions. In optimizing the pressure boundary conditions, the time history data of internal energy (LCID1) and relative volume (LCID2) referenced by *BOUNDARY_AMBIENT_EOS is expressed in mathematical formulas or tabular format and parameterized. The results obtained from the optimization confirm that the explosive source characteristics are closer to the target than those from conventional methods. Additionally, due to the increased kinetic energy of the fluid (water and explosive source) compared to conventional methods, the expansion of the explosive source has increased. 【Results of explosive source characteristics analysis using optimal values】 ■ It is confirmed that the explosive source characteristics are closer to the target than the results from conventional methods. ■ The kinetic energy of the fluid (water and explosive source) has increased compared to conventional methods, leading to greater expansion of the explosive source. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

This is a case study that examines the destruction behavior characteristics of reinforced concrete slabs (RC slabs) due to underwater explosions through numerical simulations using coupled structural-fluid analysis. The explosive used is the H51 model (Pentolite 51g), and the pressure calculations for the model utilize the JWL (Jones-Wilkens-Lee) equation of state. For water, the compressibility is taken into account using the GRUNEISEN equation of state. As a result, in the case of underwater explosions, the RC slab experiences shear failure due to the immense pressure from the water's confinement, while in the case of aerial explosions, craters, spall failures, and cracking occur on both the top and bottom surfaces of the RC slab. [Analysis Settings] - The explosive is the H51 model (Pentolite 51g), and the pressure calculations for the model utilize the JWL equation of state. - For water, the compressibility is taken into account using the GRUNEISEN equation of state. *For more details, please refer to the related links or feel free to contact us.*

• Structural Analysis

We will introduce a case where cold water is flowed through a high-temperature metal pipe for cooling, analyzed as a thermal-fluid-structure coupled problem. The solver used is the R10.1.0 high-precision version of MPPDYNA, with parallel computation on 16 CPUs. As a result, the metal pipe is cooled and the temperature decreases, while the cooling water absorbs heat from the metal pipe as it flows, resulting in higher temperatures downstream. Additionally, the temperature at the surface in contact with the solid becomes higher than that on the inside, and in the final state, the temperature of the metal pipe approaches the temperature of the fluid (283.15[K]). 【Key Keywords】 ■*ICFD_BOUNDARY_FSI: Specify the fluid-structure coupling boundary ■*ICFD_CONTROL_FSI: Set default values for fluid-structure coupled analysis ■*ICFD_BOUNDARY_CONJ_HEAT: Perform heat exchange with the solid at the fluid-structure coupling boundary ■Other: Input *CONTROL_SOLUTION, soln=2 to set up thermal-structure coupled analysis *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce a case where "cooling of metal tubes" is applied and analyzed as a coupled problem of heat, fluid, and structure. A high-temperature blank is processed by drawing with a mold at room temperature, and water is flowed through the cooling tube to cool the mold. The solver used is the R10.1.0 high-precision version of MPPDYNA, and parallel calculations are performed on 16 CPUs. As a result, the mold contacts the blank, causing the temperature at the contact point to rise, which is then cooled by water. Additionally, the water absorbs heat from the mold, causing its temperature to rise. [Contents of the Analysis Model] ■ Blank: The sheet material being processed ■ Mold 1_Die: Strokes downward to draw the blank ■ Mold 2_Punch: Remains stationary to draw the blank ■ Mold 3_Holder: Applies upward load to suppress wrinkles at the edge of the blank ■ Mold 4_Pad: Applies downward load to suppress wrinkles at the head of the punch *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

Rubber and resin materials possess a material property known as viscoelasticity. In "LS-DYNA," this property is represented by nine types of constitutive models for rubber materials (hyperelastic materials), such as the Mooney-Rivlin and Ogden models, and six types for resin materials (viscoelastic materials), such as Maxwell/Kelvin and Prony series viscoelastic bodies. Even in cases where strong geometric nonlinearity is present, LS-DYNA (explicit method) will follow through. 【Features of LS-DYNA】 ■ Nine types of models for rubber materials, including Mooney-Rivlin and Ogden models ■ Six types of viscoelastic bodies for resin materials, including Maxwell/Kelvin and Prony series *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We provide a contract analysis service where we select the appropriate solver based on the analysis theme, execute the analysis on behalf of our clients, and deliver the results report. You can also specify the analysis solver. Additionally, we can deliver the analysis model without conducting the analysis ourselves. If the standard features of commercially available analysis software cannot accommodate your needs, we also offer development services to customize the solver and incorporate the desired functionality. We can accept individual analysis tasks on a spot basis, as well as provide outsourcing services for a series of analysis tasks that arise in a project. If you have requests for service formats other than these, we will do our best to accommodate them, so please feel free to consult with us.

• Contract Analysis

Resin materials do not exhibit incompressibility associated with tensile plastic deformation. In the material constitutive model for resin, MAT_SAMP-1, an input for "plastic Poisson's ratio" is provided to represent this phenomenon. By considering the plastic Poisson's ratio, the deformation behavior of resin components can be accurately reproduced. In a graph comparing the ratio of tensile and vertical strains with experimental and analytical results, it can be seen that MAT_SAMP-1 accurately reproduces the experimental results compared to the analytical results using the metallic material constitutive model Mises (MAT_024). *For more details, please refer to the related links or feel free to contact us.*

• Structural Analysis

We would like to introduce a case study analyzing the fracture of the notched Charpy test (JIS K7111-1/1eA). A total of 10 tests were conducted, resulting in 9 hinge fractures, with a Charpy impact strength of 77 (kJ/m³). From the results of the impact strength and the behavior of the fractures, it can be said that in order to analyze the notched Charpy impact test, it is important to establish not only the "stress-strain" relationship considering strain rate dependence but also the fracture strain considering strain rate dependence. 【Case Overview】 ■ Material: Polycarbonate ■ Material Model: Resin Material Constitutive Law SAMP-1 ■ High-speed tensile tests were conducted to determine the following (1) and (2): ・(1) "Stress-Strain" relationship considering strain rate dependence ・(2) Fracture strain considering strain rate dependence *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

The plastic Poisson's ratio - equivalent plastic strain relationship is represented by two Bézier curves. Optimization calculations were conducted using the coordinates of the control points as design variables. We are attempting to reproduce the test results. In the related links below, we introduce graphs before and after the optimization calculations, so please take a look. *For more details, please refer to the related links or feel free to contact us.*

• Structural Analysis

In plastic processing analysis, the nonlinearity due to contact becomes a significant challenge, and the sudden large forces and friction that occur at the moment of contact are factors that complicate the convergence of the solution. For example, in sheet forming analysis, the contact forces between the blank material and the tool, as well as the contact forces of the draw bead that control the material flow, are the key points that control formability. Therefore, it is important to seek solutions efficiently, in addition to ensuring accuracy. When analyzing with "LS-DYNA," the explicit method allows for obtaining solutions without performing convergence calculations, making it possible to predict the required work hours, and it can be said to be suitable as a development and design tool. [Explicit Method for Analysis with LS-DYNA] - Allows for obtaining solutions without performing convergence calculations, enabling work hour predictions. - Suitable as a development and design tool. *For more details, please refer to the related links or feel free to contact us.*

• Structural Analysis

In "LS-DYNA," it is possible to consider failure for virtually all material property models. The failure criteria include (1) pressure, (2) maximum principal stress, (3) equivalent stress, (4) maximum principal strain, (5) shear strain, and (6) reference stress values and failure judgment values based on the Tuler-Butcher failure criterion. Users can select these failure criteria, but currently, there are no experimental values available for them, and sufficient preparation is necessary to use this function. 【Failure Criteria】 (1) Pressure (2) Maximum Principal Stress (3) Equivalent Stress (4) Maximum Principal Strain (5) Shear Strain (6) Reference stress values and failure judgment values based on the Tuler-Butcher failure criterion *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

In calculations involving large deformations, such as forging analysis, remeshing during the computation process is effective. In the standard remeshing function of LS-DYNA, the parts subject to remeshing are uniformly remeshed regardless of areas with large or small deformations, which can lead to a significant increase in the number of elements and potentially longer computation times. On the other hand, the "MPP version of LS-DYNA" offers a remeshing function that takes into account the density of the mesh. This allows for efficient progress in calculations involving large deformations. 【Features of MPP version LS-DYNA】 ■ Remeshing function that considers the density of the mesh is available ■ Efficiently advance calculations involving large deformations *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce a case study that examines the improvement of "cracks" and "wrinkles" by changing from single-stage to multi-stage press processing. In JSTAMP (Solver: LS-DYNA), it is possible to carry out analysis while inheriting the state of the previous process, allowing for the reproduction of multi-stage press processing. As a result, both the tendencies for cracks and wrinkles in the product parts were improved simultaneously as intended in the multi-stage processing. [Case Overview] ■ Analysis Model for Multi-Stage Processing - Stage 1: Punch stroke speed of 5000 mm/s, holder load of 20 kN - Stage 2: Die stroke speed of 10000 mm/s, holder load of 380 kN ■ Results - Both the tendencies for cracks and wrinkles in the product parts were improved simultaneously as intended. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce a case where we analyzed the press processing of a TB logo shape and evaluated "cracks" and "wrinkles" using the FLD (Forming Limit Diagram). The history of the FLD for elements that showed a tendency to crack revealed that the processing was conducted in a state close to equal biaxial tension throughout the processing time. It is expected that the material did not flow in sufficiently, resulting in a state close to equal biaxial tension. 【Model Overview】 ■ Die stroke speed: 10000 mm/s ■ Holder load: 1000 kN *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We would like to introduce a case study where a blank with a hole was processed using cylindrical drawing, and an analysis was conducted to widen the hole. The die stroke speed was set to 6000 mm/s, the load on Holder 1 was 1200 N, and the load on Holder 2 was 600 N, with the FLD (Forming Limit Diagram) being checked. As a result, it was found that the deformation state of the blank was close to uniaxial tension according to the FLD. Additionally, it is anticipated that cracks are likely to occur near the edge of the hole indicated in red. 【Model Overview】 ■ Die stroke speed: 6000 mm/s ■ Load on Holder 1: 1200 N ■ Load on Holder 2: 600 N *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

This presentation introduces a case study comparing the differences in formability between isotropic and anisotropic materials using hole expansion processing analysis as the subject. In "JSTAMP," it is possible to simulate the press processing of anisotropic materials. As a result, by considering anisotropic materials, predictive results that prevent cracking have been obtained. Additionally, since rolled materials exhibit anisotropy, it is important to consider the actual material properties in the press processing simulation. 【Model Overview】 ■ Die stroke speed: 6000 mm/s ■ Load on Holder 1: 1200 N ■ Load on Holder 2: 600 N *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce an analysis example that evaluates the buckling load and buckling shape of an empty can compressed in the vertical direction. In buckling analysis, even slight errors in the initial shape can lead to buckling behavior. Even if the analysis data has the same plate thickness, basic shape, and material properties, considering initial imperfections causes the initial buckling location to change from the bottom to the body. Additionally, when considering work hardening at the bottom of the empty can, the strength of the bottom increases, resulting in the initial buckling location being at the body. In the related links below, we present the analysis results in a video, so please take a look. [Summary] - Even if the analysis data has the same plate thickness, basic shape, and material properties, considering initial imperfections causes the initial buckling location to change from the bottom to the body. - When considering work hardening at the bottom of the empty can, the strength of the bottom increases, resulting in the initial buckling location being at the body. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce the analysis of aircraft water landing behavior. The airplane is composed of shell elements that have equivalent impact strength. The number of nodes is 143,242, and the number of elements is 144,223 (Shells 8,691, SPH 135,542). In the related links below, we present the analysis results in images, so please take a look. 【Case Overview】 ■ Water is represented by SPH elements ■ The airplane is composed of shell elements that have equivalent impact strength ■ Number of nodes: 143,242 Number of elements: 144,223 (Shells 8,691, SPH 135,542) ■ Analysis time: 4.0 seconds Computation time: 34 hours 22 minutes ■ PC CPU: Core 2 Duo 64 bits×2 3.33GHz used *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce a case study regarding "Bird Strike on Turbine Rotors." The properties of the bird are modeled as water using the Smoothed Particle Hydrodynamics (SPH) method. Contact conditions were applied between the SPH water and the Lagrangian rotor blades. In the related links below, we present the analysis results in images, so please take a look. 【Case Overview】 ■ SPH (Smoothed Particle Hydrodynamics) is suitable for analyzing fluid dispersion and large deformations. ■ The bird is modeled using the particle method (SPH). ■ The properties of the bird are modeled as water. ■ Contact conditions were applied between the SPH water and the Lagrangian rotor blades. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce a case study on the analysis of the strength and behavior of a protective net when it is impacted by falling rocks. It is possible to confirm not only the deformation of the net and the generated stress due to the impact of a rigid sphere but also the stress and deformation of the support posts caused by the net pulling on them. This analysis allows for the verification of the load-bearing capacity and failure behavior of the protective net, which can contribute to more optimal protective designs. [Analysis Results] - Confirmation of the deformation of the net and generated stress due to the impact of a rigid sphere, as well as the stress and deformation of the support posts caused by the net pulling on them. - Ability to verify the load-bearing capacity and failure behavior of the protective net. - Possible contribution to more optimal protective designs. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We present a case study of a rigid body engine colliding with a rebar-free concrete wall modeled using SPG. By using SPG, it is possible to analyze the failure behavior without causing mass and energy loss due to element deletion. With the SPG control parameters added in Ver.R10, the stability of particle behavior in brittle fracture analysis, such as collisions and penetrations of concrete materials, has improved. 【Concrete Material】 ■MAT_DAMAGE_CONCRETE_REL3 ■Density: 2.3×10-9 ton/mm3 ■Poisson's Ratio: 0.2 ■Young's Modulus: 25920 MPa ■Compressive Strength: 30 MPa ■Tensile Strength: 2.9 MPa *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We conducted an impact analysis of a reinforced concrete beam using three types of concrete constitutive laws and validated the simulation accuracy by comparing it with experimental results. The concrete constitutive laws used were KCC (MAT_072R3), Winfrith (MAT_084-085), and CSCM (MAT_159). The Winfrith model allows for the visualization of crack patterns, and the analysis results confirmed the direction of the cracks. Additionally, when examining the impact analysis at an impact velocity of 9 m/s using the KCC model, it was found that the typical impact damage behavior of the beam was well represented. 【Concrete Constitutive Laws Used】 ■KCC (MAT_072R3) ■Winfrith (MAT_084-085) ■CSCM (MAT_159) *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce a case study of seismic response analysis of a seismic isolation nuclear power plant building and retaining wall ground model, taking into account the nonlinearity of the seismic isolation devices and concrete cracking when exceeding the design seismic motion. The ground is modeled using solid elements, the building with shell elements, the internal concrete (I/C) and foundation slab with solid elements, and the seismic isolation devices with beam elements. As a result, it was observed that in a wide area around the reactor containment vessel (PCCV), the surrounding building (REB), and the retaining wall, in-plane cracking occurred in both the in-plane 1 direction and in-plane 2 direction due to the collision between the building and the retaining wall. 【Analysis Settings】 ■ After self-weight loading, seismic waves were simultaneously input in two horizontal directions and vertically (2/3 of the horizontal) at the bottom surface of the lower foundation slab. ■ The input seismic waves used were three times the Japan Architectural Center simulated seismic wave BCJ-L2. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

In considering shock analysis, there are (1) shock forces derived from absorbed energy, (2) shock forces derived from the equations of motion of rigid bodies, and (3) shock forces derived from the propagation of stress waves. (1) refers to the stress at the maximum deformation displacement when the deformable body is impacted. (2) is determined from the equilibrium of the inertial force of the colliding object (rigid body) and the reaction force from the deformable body, while (3) introduces the concept of stress waves. In 'LS-DYNA', the approach of (3) is incorporated for analysis calculations in drop and impact analysis. [Overview] ■ (1) Shock forces derived from absorbed energy - The stress is considered at the maximum deformation displacement when the deformable body is impacted. - It is assumed to occur not at the moment of impact, but when the deformation of the deformable body reaches its maximum after the impact. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We will introduce a case of shape optimization for reinforcement ribs using "LS-DYNA" and the optimization support tool "Altair HyperStudy." The height of the reinforcement ribs was optimized by preparing a model in its initial state and morphing the shape from the lower limit to the upper limit. A model was prepared for the maximum number of ribs (minimum pitch) and then morphed to achieve the minimum number of ribs (maximum pitch). As a result, since GRSM explores globally compared to ARSM, suitable shapes that meet the constraint conditions are obtained even when the plate thickness on the long side of the rib is small. 【Analysis Model】 ■ Shell elements (mesh size 10mm) ■ Elastic material ・ Young's modulus: 2000MPa ・ Density: 1.1×10^-9 ton/mm³ ・ Poisson's ratio: 0.35 *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

HYCRASH is a tool that allows for the incorporation of strain hardening through the use of a collision model, without the need to create data for processing analysis by using a one-step method. By utilizing the collision model itself, it calculates the thickness and plastic strain of the pressed material and automatically generates initial conditions for Ansys LS-DYNA. ■ Input is only the model for collision analysis ■ Configuration is limited to specifying the part of the pressed material ■ Automatically executes forming analysis on the specified part ■ Automatically sets the effects of pressing as initial conditions ■ Collision data considering strain hardening is completed

• Structural Analysis

The direct interface with the impact and structural analysis software Ansys LS-DYNA allows for the extremely efficient setup and evaluation of large and complex automotive crash analysis models, and is designed to enable easy operation for evaluating analysis results related to vehicle behavior and occupant injury values.

• Structural Analysis

Resins possess both elastic and viscous components, and in this column, we will explain the measurement methods for this property. Dynamic viscoelastic devices apply a steady-state sinusoidal strain to the specimen and measure the response stress, investigating the behavior of the viscoelastic material from the phase difference between the two. For solid testing, both ends of the sample are fixed, and a longitudinal sinusoidal wave is applied. When the sample is in liquid form, such measurements cannot be performed in this manner, so the sample is placed in a container and a sinusoidal wave in the rotational direction is applied. Since the molding process of resins includes a molten state, measurements for liquid testing are common. [Contents] ■ Dynamic viscoelastic measurement devices ■ Behavior of pure elastic bodies and pure viscous bodies - In the case of pure elastic bodies - In the case of pure viscous bodies - In the case of viscoelastic bodies *For detailed content of the column, you can view it through the related links. For more information, please feel free to contact us.

• Other analyses

We held the "AnyScript Case Study Meeting, Third Session" for the musculoskeletal analysis software AnyBody on July 26, 2022 (Tuesday). This time, we welcomed guest speakers from Matsudo Orthopedic Hospital and Kyushu Nutrition Welfare University, who presented interesting case studies. You can view the report on the meeting at the related links below. *For more details, please refer to the related links or feel free to contact us.

• Structural Analysis

We held the "AnyScript Case Study Meeting, Second Session" for the musculoskeletal analysis software AnyBody on April 26, 2022 (Tuesday). This time, the theme was product ergonomics, and we had users introduce real examples of how AnyBody has been used in the ergonomic design of industrial products. We shared modeling using AnyScript with all participants. Attendees included users who utilize AnyBody for product development, university research users, and those considering starting musculoskeletal simulation, resulting in a large event with around 100 participants. You can view the report of this meeting at the related links below. *For more details, please check the related links or feel free to contact us.*

• Structural Analysis

We held the first AnyScript case study meeting as part of a modeling study group for the AnyBody musculoskeletal analysis software. This study group is an information exchange meeting for AnyBody users, aimed at regularly providing a venue for case studies to learn AnyScript (the model description language of AnyBody) using actual user cases. This time, we focused on the knee and received user presentations on knee biomechanics research from teachers at Kurume University Medical Center Rehabilitation Center and Kobe University Graduate School of Human Development and Environment. You can view the report on the meeting at the related links below. *For more details, please refer to the related links or feel free to contact us.*

• Structural Analysis

"Altair WinProp" is an integrated simulator that derives accurate results in a short time using radio wave propagation models (empirical/deterministic models and ray optics models). It supports a variety of scenarios and map data, and hybrid analysis combining multiple types of scenarios is also possible. With the flexible WinProp API, radio wave propagation models and network planning modules can be integrated with other software. 【Features】 ■ Derives accurate results in a short time ■ Hybrid analysis combining multiple types of scenarios is possible ■ Radio wave propagation models and network planning modules can be integrated with other software *For more details, please refer to the related links or feel free to contact us.

• simulator