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Elastic plastic fracture mechanics of strength-mismatched interface cracks

机译:强度不匹配的界面裂纹的弹塑性断裂力学

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Recent progress in rationalizing and predicting the diverse ductile and brittle cracking behaviors seen in a given structural alloy under monotomic loading (e.g., shallow vs. deep cracks; tension vs. bending; ductile void growth vs. cleavage, etc.) has rested critically on improved characgerizations of elastic-plastic crack-front stress and deformation fields. For macroscopically homogeneous elastic-plastic materials, these descriptions typically include a parameter such as J or CTOD which scales the intensity of crack-tip deformation, as well as a parameter such as the T-stress or the Q parameter which accounts for the triaxiality of the crack-tip stress fields.
机译:合理化和预测给定结构合金在单向载荷下所表现出的各种延性和脆性开裂行为的最新进展(例如,浅裂纹与深裂纹;张力与弯曲;韧性空隙增长与解理等)至关重要。改进了弹塑性裂纹前应力和变形场的特性。对于宏观均匀的弹塑性材料,这些描述通常包括一个参数(例如J或CTOD),该参数可缩放裂纹尖端变形的强度;以及一个参数(例如,T应力或Q参数),该参数可解释裂纹的三轴性。裂纹尖端应力场。

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