Press molding and mold deformation weakly coupled analysis ASU/ISTR

This is an introduction to press forming simulation that takes into account mold deflection using "ASU/ISTR" and "ASU/P-form."

In the current press forming simulation, the mold is treated as a rigid body, and deflection is not taken into account. However, during actual press processing, especially when forming high-strength steel sheets, a very large load is applied, resulting in mold deflection. This causes variations in the clearance between the upper and lower molds, leading to differences in contact and surface pressure on the workpiece depending on the location. Additionally, the amount of deflection varies based on the structure of the mold. To reproduce the phenomena of actual press processing in press forming simulation, an analysis that considers mold deflection is necessary. We will introduce a case of forming simulation that takes mold deflection into account using the open-source structural analysis software FrontISTR for mold deformation and our solver ASU/P-form for forming through weakly coupled analysis. ASU/ISTR is a general-purpose pre-post software developed by our company that is compatible with FrontISTR. By utilizing the deflection weakly coupled setting function of ASU/ISTR, we can quickly incorporate the analysis results from ASU/P-form and automatically set the conditions. Moreover, it allows for easy analysis setup and execution on a Windows PC. FrontISTR excels in parallel computing, and there are no licensing costs even when using a PC with a large number of cores.

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