Spectrum analysis was performed to determine the micro-mechanism of damage evolution of C fiber 3-D braiding composite material.
通过声发射波形信号的频谱分析，研究了碳纤维三维编织复合材料拉伸损伤的细观机理。
At the same time, some scientific hypotheses of the damage evolution equations and stress-strain relationship as well as the failure mechanism of rock mass are also proposed.
同时，也为进一步建立岩体结构合理的损伤演化方程、本构关系和研究岩石破坏机理提供了科学依据。
A method for discreted description of damage mechanism is given, and the evolution equation of discreted orientation density of cracks is obtained.
文中给出了损伤机构离散化的方法，并对方位密度给出了演化方程。
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