Development of high-strength steel sheets and forming technology for next-generation automotive applications, along with evaluation of deformation characteristics.
S11119
How can we reduce molding defects such as "springback" and "cracking"? What are the material properties for next-generation automotive applications? Aiming for steel sheet optimization!
**Lecturers** **Part 1:** Professor Susumu Takahashi, Department of Mechanical Engineering, Faculty of Engineering, Nihon University (Formerly employed at Nissan Motor Co., Ltd.) **Part 2:** Mr. Kazuhiro Seto, Head of Thin Plate Research, JFE Steel Corporation, Steel Research Laboratory **Part 3:** Professor Toshihiko Kuwahara, Ph.D., Department of Advanced Mechanical Systems, Graduate School of Engineering, Tokyo University of Agriculture and Technology **Target Audience:** Researchers and personnel interested in high-strength steel plates and high-tensile materials for automotive components. **Venue:** Kyouka Square 2F, High-Tech Center, Room 2 Chuo Ward, Tokyo 1-minute walk from Exit A3 of Hatchobori Station (Tokyo Metro Hibiya Line / JR Keiyo Line) 5-minute walk from Exits A1 and A2 of Takaracho Station (Toei Asakusa Line) **Date and Time:** November 29, 2011 (Tuesday) 11:00 AM - 4:00 PM **Capacity:** 30 participants *Please apply early as there may be a rush of applications.* **Participation Fee:** **Early Bird Discount Price:** 49,350 yen (tax included, including text costs) for up to 2 participants from one company. *This is limited to Tech-Zone members who apply by November 15. Membership registration is free.* *After November 15, the regular price will be 52,500 yen (tax included, including text costs) for up to 2 participants from one company.*
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**Lecture 1: Summary of the Presentation** In the development of automobile bodies, efforts are being made to contribute to the mitigation of global warming while also considering safety, leading to the advancement of lightweight vehicle bodies. To achieve this goal, high-strength materials (high-tensile steel sheets) that have higher strength than ordinary steel sheets are being used. While high-tensile materials have higher strength compared to ordinary steel sheets, they also have lower ductility and poorer formability. This presentation will discuss the demand for high-tensile materials in the automotive environment, the characteristics observed in the forming of actual parts, and introduce examples of numerical simulations used for formability evaluation to shorten development periods. **Lecture 2: Summary of the Presentation** To promote the lightweighting of automobile bodies aimed at improving fuel efficiency and safety performance, various high-tensile steel sheets tailored to each component are being developed. The trend toward lightweighting and improved crash performance is expected to remain largely unchanged even as electric vehicles become mainstream in the future. This lecture will introduce the reinforcement mechanisms, mechanical properties, press formability, and application examples of distinctive high-tensile steel sheets that have been developed so far, as well as outline the development trends and challenges in the application of ultra-high-tensile steel sheets that are expected to see expanded use in the future.
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Part 1: Body Parts Using High-Strength Steel Plates and Forming Prediction Technology [Program] 1. Introduction 1-1. Expectations for Automobiles 1-2. Relationship Between Automobile Weight and Fuel Efficiency 2. Types of Defects in Automobile Parts 3. Application and Formability of High-Strength Steel Plates 4. Sheet Forming Simulation Part 2: Development Trends of Advanced High-Strength Steel (AHSS) Compatible with Electric Vehicles [Program] 1. Trends in the Application of High-Strength Steel Plates 2. Steel Plate Strength and Impact Absorption Energy 3. Strengthening Mechanisms of Steel and Types of High-Strength Steel Plates 4. Recently Developed Distinctive High-Strength Steel Plates (AHSS: Advanced High Strength Steel) 5. Ultra-High-Strength Steel Plates and Challenges/Countermeasures in Application Part 3: Evaluation Methods for Deformation Characteristics of High-Strength Steel Plates and High Precision in Forming Simulation [Program] 1. Anisotropic Yield Function as a Material Model 2. Biaxial Tensile Test Method for Metal Sheets 3. Simulation and Experimental Verification of Stretch Flange Forming 4. Springback Analysis and Experimental Verification in Bending and Unbending Deformation 5. Measurement Methods for Plastic Deformation Characteristics of Metal Sheets Under Large Strain Biaxial Tensile Stress States [Q&A]
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