【摘要】 冷冲压成形所用的板料是经过多次辊轧和热处理而取得的,具有明显的各向异性,圆筒形件拉深时法兰部分处于平面应力状态,筒壁部分是单向应力状态。根据两种不同的应力状态,推导了屈服应力与R值的关系,加深了对各向异性屈服准则的认识。更多还原

【Abstract】 The sheet used in cold stamping usual ly need roll foring and heat treatmen t,which conduces the sheet anisotro pic.The flange of the cylinder is in plane stress state,while the wall is in one -way stress state in the cause of drawing.In the test,the relation of the yielding stress to R is derived,according to two kinds of stress states.更多还原