含球形孔洞脆性材料拉伸破坏的扩展有限元法分析

Numerical Simulation for Failure Process of Brittle Material Containing Spherical Cavities Using XFEM

应用扩展有限元法模拟了含球形孔洞脆性材料拉伸破坏机理及破坏过程。分析了含球形孔洞的脆性材料单向拉伸情况下孔洞体积百分数对结构承载力的影响。数值计算结果显示,基于扩展有限元模型的数值方法可以准确的和可视化的直观方式分析含球形孔洞脆性材料拉伸破坏过程。结果表明,含球形孔洞脆性材料结构拉伸破坏的承载力与孔洞体积百分数密切相关。

An extended finite element method （XFEM） simulation for failure mechanism and failure pro- cess of brittle materials containing spherical cavities due to tension load is presented. Numerical analysis is conducted to study the effects of void fraction on bearing load of brittle materials containing spherical holes under uniaxial tension loading. Numerical results show that the proposed XFEM can accurately and visually analyze the tension failure process of brittle materials with spherical cavities. It indicates that void fraction has significant effects on the tension failure bearing load of brittle materials containing spherical holes.