An exact expression of energy release rate for geometrical nonlinear elastic fracture mechanics is obtained for an infinite plate with central crack under uniform stress normal to crack surfaces.
对含中心裂纹的无限大板在裂纹表面受均匀分布压力作用的情况，导出了几何非线性弹性断裂力学的能量释放率的一个精确表达式。
The energy release rate for crack propagation depends only on the stress intensity factor and the material constants.
电导通裂纹模型中的静电场对裂纹尖端扩展的能量释放率不作贡献。
The results show that the stress intensity factor is independent of material constants, and the strain energy release rate is dependent on all material constants.
结果表明，应力强度因子与材料常数无关，而应变能释放率依赖于所有的材料常数。
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