Browse Publications Technical Papers 2000-01-2657
2000-10-03

A Benchmark Test for Springback Simulation in Sheet Metal Forming 2000-01-2657

Springback is a serious problem in sheet metal stamping. It measures the difference between the final shape of the part and the shape of the forming die. Sheet metal forming simulation has made significant progress in predicting springback and several computer simulation codes are commercially available to predict and compensate for it in tool design. The accurate prediction of springback is important and there is a need to validate and verify those predictions with experimental results. Current validation techniques lack standardized procedures, require measurement fixtures that may impose unrealistic restraint on the part, require profiling equipment such as CMM or laser scanning and for the most part produce small springback which reduces measurement accuracy and increases experimental error. A benchmark test has been developed which addresses all these concerns and compares springback predictions by various numerical simulation codes with each other and with experimental results. The benchmark test can also be used to calibrate computer simulation codes by selecting their control parameters to achieve a satisfactory correlation between simulation and benchmark test results.

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