依据圆腔凹模中液压胀形件顶点材料的变形,是在其板面内的两个主应力同等作用下进行的。本文应用最近发展的塑性异性理论,建立了这两个主应力的差值的预测式。对几种金属板料的计算和实验验证表明,预测结果良好,精度是令人满意的。
According to the characteristics that the two principal stresses in plane at thepole of a bulging speciman in a die with circular cavity are playing equally important role inleading the deforming of material here,a method predicting the quantitative diffe
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