The paper presents models to characterize the dependence of hardening and strength characteristics of composite materials on damage and strain rate. The results of experimental studies of the behavior of composite materials in a wide range of strain rates are analyzed, and some regularities are determined. On the base of a failure criterion which includes the dependence of failure characteristics on damage and the rate of damage as well, taking into account the dependence of stiffness characteristics on the damage parameters, the stress–strain curves are determined for different strain rates, and they correlate quite well with the results of experimental studies. A method for the experimental determination of the material’s parameters is proposed. Some cases of complex, non-monotonic loading and unloading of composite materials are analyzed.

中文翻译：

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应变速率对复合材料硬化和损伤特性的影响

本文提出了表征复合材料的硬化和强度特性对损伤和应变率的依赖性的模型。分析了复合材料在很宽的应变速率范围内的行为的实验研究结果，并确定了一些规律。基于包括破坏特性对损坏和损坏率的依赖性的破坏准则，考虑刚度特性对损坏参数的依赖性，确定不同应变率下的应力-应变曲线，并且它们与实验研究的结果非常相关。提出了一种通过实验确定材料参数的方法。分析了复合材料复杂的非单调加载和卸载的一些案例。