Prediction of Forming Limit Diagram Dependent on Strain History in Sheet Metal Forming

변형경로를 고려한 판재의 성형한계도 예측

  • Published : 2001.07.01


The forming limit diagram introduced by Keeler and Goodwin has been used generally to analyze the formability of sheet metal. However, path dependent forming limit curves based on the state of strain can be explained only by a single criterion which is based on the state. In this study, experimental forming limits in strain space of some metal sheets are transformed into forming limit curves in stress space. Effects of yield criterion are investigated in transforming the forming limit curves. Some important design aspects which are based on the close prediction of movements in forming limit curves during sheet forming are concluded.


Forming Limit Diagram;Forming Limit Stress Curve;Formability;Sheet Metal Forming


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