The maximum tangential strain energy density (MTSED) criterion was modified by taking the influences of stress intensity factors and T‐stress into consideration for combined mode I–III brittle fracture. Furthermore, the Poisson's ratio and T‐stress influencing the fracture characteristics of cracked components were discussed by using the extended MTSED criterion. Moreover, the predicted values of this extended MTSED criterion and some testing results were comparatively analysed. The results indicate that the Poisson's ratio and T‐stress have no impact on the out‐of‐plane initiation angle; however, their effects on fracture resistance ratios are significant especially for pure mode III. A positive T‐stress increases the fracture resistance ratio, and it is opposite for a negative T‐stress. The predicted values calculated by the extended MTSED criterion agree very well with the testing data obtained with edge‐notched disc bend samples especially for pure mode III case.

中文翻译：

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I-III型脆性断裂考虑T应力的扩展最大切向应变能密度准则

通过将应力强度因子和T应力的影响纳入I-III组合脆性断裂模型，修改了最大切向应变能密度（MTSED）准则。此外，使用扩展的MTSED准则讨论了泊松比和T应力对裂纹组件断裂特性的影响。此外，对扩展的MTSED标准的预测值和一些测试结果进行了比较分析。结果表明，泊松比和T应力对平面外初始角没有影响；但是，它们对抗断裂比的影响非常显着，尤其是对于纯模式III。正T应力会增加抗断裂强度比，而负T应力则相反。