弹性压头与复合材料层合梁间的弹性接触分析

CONTACT ANALYSIS BETWEEN AN ELASTIC INDENTER AND A LAMINATED BEAM

冲击器与复合材料接触性态的研究是复合材料低速冲击响应研究的关键。本文采用处理弹性接触问题的有限元混合法研究了弹性压头与复合材料层合梁间的弹性接触问题。用数值算例讨论了静力接触定律和压头弹性、层合梁铺设方式及摩擦等因素对接触内力和层合梁内部层间应力大小和分布的影响,得到一些有益的结论。

The low-velocity impact response of composite laminated structures is very important. An accurate account of the contact problem of an elastic indenter and a laminated beam is given by using the mixed finite element method for solving elastic contact problems. The statical contact law is discussed. The effects of indenter elasticity, laminated beam lay-up and friction on the contact forces between the indenter and the laminated beam and the induced interlaminar stresses in the laminated beam are assessed. Based on the numerical results obtained, certain conclusions are drawn.