The predominant failure modes in stampingofsheetmetal parts are wrinkling and fracture. In general, these defects may be eliminated by appropriately manipulating the Blank-Holder Forces.
In sheetmetal forming fields, the final shape of part is commonly controlled by the springback after stamping, so the springback problem is the hotspot of research all the time.
在板料成形领域，零件的最终形状往往取决于成形后的回弹，所以回弹问题一直是研究的热点。
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In the stamping and forming processes of automotive covering parts, only the maximum deformability, which is reachable in stable deformation stage of sheetmetal, can be made use.