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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >ELASTIC-PLASTIC CONTACT BETWEEN ROUGH SURFACES: PROPOSAL FOR A WEAR MODEL
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ELASTIC-PLASTIC CONTACT BETWEEN ROUGH SURFACES: PROPOSAL FOR A WEAR MODEL

机译：粗糙表面之间的弹塑性接触：磨损模型的建议

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A semi-analytical thermo-elastic-plastic contact model has been recently developed, and presented in a companion paper. The main advantage of this approach over the classical Finite Element Method (FEM) is the treatment of transient problems with the use of fine meshing, and the possibility of studying the effect of a surface defect on the surface deflection as well as on subsurface stress state. A return-mapping algorithm with an elastic predictor / plastic corrector scheme and a Von Mises criterion is now used, which improves the plasticity loop. This improvement in the numerical algorithm increases the computing speed significantly, and shows a much better convergence and accuracy. The contact model is validated through a comparison with the FEM results of Kogut and Etsion (2002), which correspond to the axisymmetric contact between an elastic-perfectly plastic sphere and a rigid flat. A model for wear prediction based on the material removal during cyclic loading is then proposed. Results are presented for rough surfaces.
机译：最近开发了一种半分析热弹塑性接触模型，并在随附的论文中进行了介绍。与经典有限元方法（FEM）相比，此方法的主要优点是可以通过使用精细网格划分来处理瞬态问题，并且可以研究表面缺陷对表面挠度以及对地下应力状态的影响。现在使用带有弹性预测器/塑性校正器方案和Von Mises准则的返回映射算法，该算法改进了可塑性循环。数值算法的这一改进显着提高了计算速度，并显示出更好的收敛性和准确性。通过与Kogut和Etsion（2002）的FEM结果进行比较来验证接触模型，该结果对应于完全弹性的塑料球体和刚性平面之间的轴对称接触。然后提出了一种基于循环加载过程中材料去除的磨损预测模型。给出了粗糙表面的结果。

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