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摘要：
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采用主应力法推导圆管扩径时扩径力的解析式。计算结果表明扩径力随扩径系数Ψ或组合参数B的增大而增大。进行扩径实验并实测了扩径力;根据部分扩径力实测参数反算了相应的摩擦系数;并采用解析式和平均摩擦系数预报了不同顶锥锥角时的扩径力。当顶锥锥角较小时,扩径力计算值与实测值符合较好。
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The formula of tube expanding force is deduced using the slab method. The tube expanding force increases with the increasing of expanding coefficient Ψ and combination coefficient B. The experiments of tube expanding are carried out and the tube expanding forces are measured. The friction coefficients are calculated according to some measured tube expanding force values. Tube expanding forces resulted from different punch angles are predicted by using the formula of tube expanding force and the average friction coefficient. The calculated expanding forces show good agreement with the measured results when the punch angle is smaller.
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作者简介：
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参考文献：
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