论文标题
内聚材料中动态裂纹前变形
Dynamic crack front deformations in cohesive materials
论文作者
论文摘要
裂纹前沿由于异质性而变形，检查这些变形可以揭示材料特性的局部变化，并有助于预测平面损伤。当前模型忽略了有限耗散长度尺度在裂纹尖端后面的影响，称为过程区域大小。后者引入了裂纹前部变形的尺度效应，裂纹的裂纹动力学减轻了裂纹前沿的效果。我们提供了一个理论框架，用于在异质凝聚力材料中动态裂纹前部变形，并使用数值模拟验证其预测。
Crack fronts deform due to heterogeneities, and inspecting these deformations can reveal local variations of material properties, and help predict out of plane damage. Current models neglect the influence of a finite dissipation length-scale behind the crack tip, called the process zone size. The latter introduces scale effects in the deformation of the crack front, that are mitigated by the dynamics of the crack. We provide a theoretical framework for dynamic crack front deformations in heterogeneous cohesive materials and validate its predictions using numerical simulations.
