邓肯-张模型几种改进方法的比较

Comparison of several methods for improving Duncan-Chang model

针对邓肯-张模型忽略了中主应力影响的不足之处,不少国内外学者提出了修正方法。在这些方法当中,究竟哪一种方法能更好地反映中主应力的影响,是需要讨论的问题。针对平面应变这一特殊情况,分别运用各种修正方法计算得出其应力-应变关系,在此基础上与平面应变试验资料进行分析比较,从中得出一些有意义的结论。

Several methods to improve the ability of Duncan-Chang model to take into account the effects of the intermediate principal stress on the strength and deformation were presented. Some typical modified methods are used to simulate plane strain tests. The abilities of these methods are examined; and thus some useful conclusions are drawn.