THE ASYMPTOTIC ANALYEICAL SOLUTION OF THE STRAINHARDENING ELASTO-PLASTIC PLATE CONTAINING A CIRCULAR HOLE UNDER SIMPLE TENSION

In this paper the general asymptotic analytical solution ofplane problem of elasto-plasticity with strain-hardening[2]isused in solving the problem of an infinitely large plate con-taining a circular hole under simple tension,and the analy-tical expressions of stress components of the first two approxi-mations,are given,These results are compared with the numeric-al and the experimental results given by other authors[4,5],and a good agreement is obtained.At the end of this paper theauthors inspect the correctness of Neuber’s formula[9]for thisproblem.     

有强化弹塑性含圆孔单向受拉板的渐近解

本文运用有强化弹塑性平面问题的一般渐近解,以解决有强化弹塑性含圆孔的无限大板在单向受拉下的应力分布问题.文中求得了二次近似解的应力分量的解析表达式,并与其他作者的数值计算[4]和实验结果[5]进行了比较,结果颇为符合.最后,作者还就Neuber公式的正确性进行了考查.     

用于压力容器破前漏(LBB)断裂分析的各种评估理论及计算精度研究

对压力容器LBB断裂分析的各种评估理论作了简要评述,并以环向贯穿裂纹的断裂评定为实例对各种评定方法的精度加以对比.指出:JR曲线稳定性评定图法是根据推动力曲线与阻力曲线的相切条件确定失效点的,理论清晰,可以作为各种评估方法的理论依据.R6的失效评定图法属近似的图解评定方法,评定结果最为保守;JR曲线映象法(RCI)是变更裂纹尺寸的失效评定图法,它能给出与JR曲线稳定性分析相同的预测,属精细的图解评定方法;最大相容应力法是通过求解综合的稳定平衡方程而确定失稳应力的,它能精细地给出裂纹撕裂扩展的全过程,比JR曲线稳定性分析方法更为简洁精确.