A finite element study of the deformations, forces, stress formations, and energy losses in sliding cylindrical contacts
A finite element study of the deformations, forces, stress formations, and energy losses in sliding cylindrical contacts
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DOI：
10.1016/j.ijnonlinmec.2007.03.017
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发表时间：
2007-09-01
影响因子：
3.2
通讯作者：
Green, Itzhak
中科院分区：
文献类型：
--
作者：
Vijaywargiya, Raghvendra;Green, Itzhak
这项工作提出了一个有限元分析（FEA）的结果，用于模拟二维（2D）两个干扰弹塑性圆柱体之间的滑动。圆柱体的材料被建模为理想弹塑性，并遵循von Mises屈服准则。有限元分析提供了变形、反作用力、应力和净能量损失的趋势，这些趋势是气缸之间的过盈和滑动距离的函数。给出了无摩擦滑动和摩擦滑动的结果并进行了比较。塑性和摩擦对滑动过程中能量损失的影响是孤立的。本文还提出了弹塑性变形下滑动净能量损失随滑动距离变化的经验公式。冯米塞斯应力的等值线图显示的应力的形成和分布，随着塑性变形的滑动进展。这项工作表明，对于塑性加载的情况下，水平力与垂直反力的比率是非零的点，其中圆柱体是完美的垂直轴对齐。此外，还定义了水平牵引力与垂直反作用力的“载荷比”。虽然这类似于滑动面间摩擦系数的一般定义，但它只包含塑性中能量损失的影响。在不同的垂直干扰下，得到了滑动过程中接触半宽的值。(C)2007爱思唯尔有限公司保留所有权利。
This work presents the results of a finite element analysis (FEA) used to simulate two-dimensional (2D) sliding between two interfering elasto-plastic cylinders. The material for the cylinders is modeled as elastic-perfectly plastic and follows the von Mises yield criterion. The FEA provides trends in the deformations, reaction forces, stresses, and net energy losses as a function of the interference and sliding distance between the cylinders. Results are presented for both frictionless and frictional sliding and comparisons are drawn. The effects of plasticity and friction on energy loss during sliding are isolated. This work also presents empirical equations thatt relate the net energy loss due to sliding under an elasto-plastic deformation as a function of the sliding distance. Contour plots of the von Mises stresses are presented to show the formation and distribution of stresses with increasing plastic deformation as sliding progresses. This work shows that for the plastic loading cases the ratio of the horizontal force to the vertical reaction force is non-zero at the point where the cylinders are perfectly aligned about the vertical axis. In addition, a "load ratio" of the horizontal tugging force to the vertical reaction force is defined. Although this is analogous to the common definition of the coefficient of friction between sliding surfaces, it just contains the effect of energy loss in plasticity. The values of the contact half-width are obtained for different vertical interferences as sliding progresses. (C) 2007 Elsevier Ltd. All rights reserved.