摘要
研究大型复杂汽车覆盖件的冲压加工时,经常在金属薄板表面制出圆网格进行变形分析.板材冲压加工后,网格变成椭圆.本文对变形椭圆的选择及颈缩或裂纹的形式,进行了详尽分析,给出拉伸失稳极限应变的计算方法.结果表明,该法得出的失稳应变与实验结果相符合,并可结合成形极限图在生产中应用.
Circle grids are usually made on the surface of sheet metal to analyse deformationwhen we study the stamping of large and complicated panels and these circle grids will deforminto ellipses after metal working.The choice of deformed ellipses and the styles of necking orcracking are analysed in detail in this paper while the result shows that the strain in instabilitycalculated in this way coincides with the experiment and can be put into practice by use of FLD.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
1993年第3期79-83,共5页
Journal of Harbin Institute of Technology
关键词
失稳
极限应变
薄板
成形极限图
Limit strain
instability
sheet metal
forming
limit diagram(FLD)
