Abstract

A methodology for simulating mathematically the limit states of machines and structures subjected to quasi-static operational and shock impacts is generated by considering great (final) deformations and degradation of the properties of materials. The known experimental results and the modern mesomechanics conceptions on the structure, damage, and nonlinear processes of viscous-plastic faults of polycrystalline metals under high temperatures and loading rates are the basis of the mathematical models used. The results of simulation of a preliminarily loaded stripe with a cut in the area where two different materials are joined and which is subjected to shock impact are presented. Such bimetallic joints are typical for structures widely used in technical engineering, and they are of particular attention under operation. How the parameters of quasi-static loading and degradation of material properties influence the wave processes of deformation and the limit states important for lifetime estimation are shown.

中文翻译：

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预测运营中受到冲击影响的受损结构的剩余寿命

摘要

通过考虑材料的大（最终）变形和性能下降，产生了一种数学上模拟准静态运行和冲击冲击的机器和结构的极限状态的方法。在高温和高负荷率下，多晶金属的粘塑性断裂的结构，损伤和非线性过程的已知实验结果和现代的力学理论是所用数学模型的基础。给出了模拟的结果，该模拟结果是在两个不同的材料连接在一起并受到冲击的区域中切出的一条预先加载的条带。这种双金属接头是在技术工程中广泛使用的结构的典型代表，并且在操作中特别受到关注。