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Abstract：
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With the increasing requirements to the lightening of auto body,as an important index of material selection of outer panel,the sinking resistance is noticed by the designer.The dent resistance tests of four steel grades with different yield strength were carried out in different pre-strains.It is shown that the strain strengthening will obviously improve the strength of sheet steel and the local dent resistance.With the increasing of yield strength of steel sheet,the load in certain dent depth will increase and the dent resistant ability will be strengthened further.The dent resistant ability will be improved by the strain strengthening in the stamping process.
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AuthorIntro：
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Reference：
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[1]朱文英.汽车轻量化与高强度钢板的开发进展[J].上海金属,2003,25(4):11-15.
[2]徐伟力,艾健,俞宁峰,等.冲压-刚度的耦合仿真分析技术[J].锻压技术,2006,30(1):6-8.
[3]俞宁峰,汪承璞,李川海.汽车钢板抗凹性试验方法及其应用[J].锻压技术,2004,28(1):51-53.
[4]李东升,周贤宾,吕晓东,等.汽车板抗凹性评价体系及试验机系统[J].北京航空航天大学学报,2003,29(5):467-470.
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