扩展边界元法研究围压下巴西圆盘应力强度因子

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  文章建立了扩展边界元法(XBEM)研究围压作用下巴西V形切口圆盘(SV-BD)应力强度因子的新途径。首先在切口尖端区域挖取一微小扇形域,将该扇形区域的位移和应力场表示为有限项奇性指数和特征角函数的线性组合,代入弹性力学控制方程,导出关于巴西圆盘切口应力奇性指数的常微分方程组特征值问题,运用插值矩阵法可一次性地计算出切口各阶应力奇性指数及其相应的位移特征角函数。
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