高分子材料的粘弹性摩擦接触力学研究  

MECHANICAL RESEARCHER ON VISCOELASTIC FRICTIONAL CONTACT OF POLYMER

作　　者：江晓禹[1] 孔祥安[1] 

机构地区：[1]西南交通大学应用力学研究所,四川成都610031

出　　处：《高分子材料科学与工程》2000年第1期16-19,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金

摘　　要：采用非线性有限元方法研究了高分子材料的粘弹性摩擦接触问题 ,采用初应变法将粘弹性材料的蠕变应变转化为等价的虚拟节点力 ,并结合线性粘弹性理论对蠕变应变进行迭代修正 ,从而获得粘弹性材料满足摩擦接触条件的解答。文中考虑了接触问题的边界非线性和粘弹性材料的材料非线性。并考虑了接触过程中温度、模量等随时间的增加而改变。研究结果集中表现了接触区的变形、应力分布等情况。作为具体示例 ,计算了钢与高分子聚丙烯材料在不同摩擦系数下的接触问题 ,获得了粘弹性摩擦接触问题的大量结果。The viscoelastic frictional contact problems were studied for high polyemr by nonlinear FEM. Using the initial strain method, the creep strains of viscoelastic materials are turned into equivalent pseudo node forces. And the linear viscoelastic theory is used to correct the creep strains by repeatly calculating. Finally, the solutions satisfying the frictional contact requirement are obtained for viscoelastic materials. The nonlinearities of contact boundary conditions and viscoelastic materials are considered. In the contact process, the temperature and modulus are changed with time. The distributions of stresses and deformations on contact surface are presented. As a numerical example, the contact problems between steel and polypropylene are calculated for different coefficients of friction, and numerous results are obtained.

关 键 词：粘弹性 接触应力 摩擦 高分子材料 

分 类 号：O631.21[理学—高分子化学] TQ317.3[理学—化学]