A commonly used design criterion for predicting the onset of crack link up at a multiple site damage (MSD) is when the sum of the plastic zones of two adjacent cracks is equal to the remaining ligament (Swift 1985, Broek et al 1994). The collapse load predicted by this criterion, however, will differ with the analtyical plastic zone and in general, will yield a nonconservative load. Recently, Pyo et al (1997) have shown that the T~* integral, which was designed for elastic-plastic fracture mechanics, can predict the extent of stable crack growth and the subdequent collapse load of widepanel MSD experiments (deWit et al, 1994). The purpose of this paper is to present experimenta;umerical results on stable crack growth and linkup of idealized MSD based on the T~* integral.
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机译：预测多点损伤（MSD）处裂纹连接开始的一种常用设计准则是两个相邻裂纹的塑性区总和等于剩余的韧带（Swift 1985，Broek et al 1994）。但是，根据该标准预测的倒塌载荷将随无定形塑料区的不同而不同，并且通常会产生非保守载荷。最近，Pyo等人（1997年）表明，为弹塑性断裂力学设计的T〜*积分可以预测稳定的裂纹扩展程度以及随后的宽面板MSD实验的塌陷载荷（deWit等人，1994年）。 ）。本文的目的是提供实验//基于T〜*积分的理想MSD稳定裂纹扩展和连接的数值结果。
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