This fundamental solution has satisfied free crack boundary conditions.

该基本解满足自由裂纹的边界条件。

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Based on the boundary variational theorem, the energy release quantity and energy release rate (dynamical crack extension force) along the crack boundary are obtained.

由此求得动态裂纹扩展时，沿裂纹边界的能量释放量和能量释放率(动态裂纹扩展力)。

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Solves the problem of boundary value on an annular crack by using the nonlocal stress solution of an axisymmetric crack problem and approximative method of series expansion.

利用已得到的三维轴对称问题的非局部弹性应力的解，采用级数近似展开的方法，求解环状裂纹的边值问题。

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