双材料复杂界面性能的近场动力学研究

Peridynamics Study on Complex Interface Properties of Bi-Material

为了研究双材料复杂界面力学性能,本文基于近场动力学的串联模型研究了直线形、锯齿形和城墙形3种双材料界面模型的力学性能,并同采用有限元方法的3种双材料界面模型进行了对比。结果表明:基于近场动力学的串联模型适用于双材料复杂界面的位移和应力求解;双材料交界面的刚度和形状不连续直接影响了双材料结构的位移和应力;直线形界面受到刚度不连续的影响,变形和应力平坦;锯齿形和城墙形界面受到刚度和几何不连续的影响,变形和应力整体呈波浪状。

In order to study the mechanical properties of complex interfaces in bimaterials,the mechanical properties of three bimaterial interface models were investigated,linear,serrated,and city wall based on a series model of peridynamics,and the three bimaterial interface models was compared with using finite element method.The results indicate that the series model based on peridynamics is suitable for solving displacement and stress at complex interfaces of bimaterials.The stiffness and shape discontinuity of the bimaterial interface directly affect the displacement and stress of the bimaterial structure.The interface is affected by stiffness discontinuity,resulting in deformation and flat stress.The serrated and city wall interfaces are affected by stiffness and geometric discontinuities,resulting in overall wave like deformation and stress.