energy release短语¹³¹⁶²⁰⁺³ 基本例句 能量释出 First, the history of fracture mechanics is briefly reviewed. The concepts of stress intensity factor, energy release rate, fracture criteria and their relationship are introduced. 本文首先简要回顾了断裂力学的发展，介绍了线弹性断裂力学的应力强度因子准则和能量准则，以及两者的关系。 qfpaper