Abstract

It is shown using the methods of acoustic emission in the version of linear location and internal friction that, upon extension of an initially equilibrium composition (carbon-fiber-reinforced plastic), nonrelaxed stress is accumulated at sites of explosive creation of microcracks. This process is caused by incomplete relaxation redistribution of the stored energy/elastic strain according to the nonlinear mechanism. The increasing level of nonrelaxed stress inevitably transforms a heterogeneous body into the metastable state. Due to this, the dissipative ability of the system as a whole decreases and the probability of occurrence of a nonequilibrium crack increases.

中文翻译：

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具有规则结构的实体在静态变形时的损伤累积：微裂纹和非松弛应力

摘要

使用线性位置和内部摩擦形式的声发射方法显示，在初始平衡成分（碳纤维增强塑料）扩展后，非松弛应力会累积在爆炸性微裂纹的产生位置。此过程是由存储的能量/弹性应变根据非线性机制的不完全松弛重新分布引起的。非松弛应力水平的提高不可避免地将异质体转变为亚稳态。因此，整个系统的耗散能力降低，发生不平衡裂纹的可能性增加。