A MESHLESS METHOD FOR STRESS-WAVE PROPAGATION IN ANISOTROPIC AND CRACKED MEDIA

摘要：

A meshless algorithm is presented for simulating stress-wave propagation in anisotropic and cracked media.A modified MLS procedure is used to introduce the displacement boundary conditions.The semi-discretized MLPG (Meshless Local Petrov-Galerkin) formulations of the elastic-dynamics equations are solved by using the explicit central difference method with a lumped mass matrix.The accuracy of this algorithm is verified by comparing the obtained results with those from the method of characteristic curves.Finally,by introducing a visibility criterion to present cracks and employing the dynamic J0 integral as the dynamic fracture parameter,the diffraction of stress waves around a slanted crack is investigated.

关键词： meshless modified MLS stress-wave propagation anisotropy crack

作者: L.T.Gao X.Q.Feng K.X.Liu

作者单位: Department of Engineering Mechanics,Tsinghua University,Beijing,100084,China LTCS and Department of Mechanics and Aerospace Engineering,College of Engineering,Peking University,

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 1531-1534

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）