Abstract

Experimental data on the failure and deformation of various materials are considered from the viewpoint of the kinetic concept of fracture as thermodynamic processes occurring over time. Mathematical modeling of the general and local plastic flows in materials is based on rheological models of a solid with due allowance for damage accumulation. The prediction of the longevity of materials under constant or variable temperature and force conditions is performed by time steps, including situations with changes in the material structure. A single fracture criterion is used, which implies that fracture occurs after reaching a threshold damage concentration (concentration criterion) in a certain volume of the solid body.

中文翻译：

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基于断裂运动学概念的材料寿命研究

摘要

从随着时间推移发生的热力学过程的断裂动力学概念的角度考虑了各种材料的破坏和变形的实验数据。材料中一般和局部塑性流动的数学模型是基于固体的流变模型，并适当考虑了损伤累积的情况。在恒定或可变温度和力条件下对材料寿命的预测是通过时间步长进行的，包括材料结构发生变化的情况。使用单个断裂准则，这意味着在一定体积的实体中达到阈值损伤浓度（浓度准则）后发生断裂。