采用非线性有限元与边界元耦合方法求解工程实际问题的文献已有不少,这是因为有限元法具有有效处理非线性问题的优点,边界元法具有计算简单、应力精度高,尤其是能精确处理无限域和半无限域边界的优点。在已有的论文中,大部分作者仅限于讨论二维问题,然而在工程中大量遇到的是三维问题,因此建立三维弹塑性有限元与边界元耦合方法和讨论其 There are many literatures for solving practical engineering problems by using nonlinear finite element and boundary element coupling methods. This is because the finite element method has the advantage of effectively dealing with nonlinear problems. The boundary element method has a simple calculation and high stress accuracy, especially The advantages of accurately dealing with the boundaries of the infinite and semi-infinite domains. In the existing papers, most of the authors are limited to discussing two-dimensional problems. However, the three-dimensional problems encountered in engineering are numerous. Therefore, three-dimensional elastoplastic finite element and boundary element coupling methods are established and discussed.