Stress disturbances caused by the inhomogeneity in an elastic half-space subjected to contact loading
Stress disturbances caused by the inhomogeneity in an elastic half-space subjected to contact loading
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DOI：
10.1016/j.ijsolstr.2006.05.021
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发表时间：
2007-02
影响因子：
3.6
通讯作者：
C. Kuo
中科院分区：
文献类型：
--
作者：
C. Kuo
不均匀性会增加局部应力，导致微观结构改变，从而引发循环接触载荷下滚动体的疲劳失效。为了研究非均匀性引起的应力扰动，对圆柱形压头在含有任意形状非均匀性的弹性半空间上的滑动进行了二维接触应力分析。采用边界元法对接触问题进行分析，通过数值求解一组积分方程，确定实际接触边界、接触压力以及接触面上的力和位移。数值结果研究了不同位置、不同尺寸和不同材料性质的非均匀性对应力场的影响。结果还表明，在滚动接触元件中，硬夹杂物比软变形颗粒更有害。
Inhomogeneities can increase localized stress and cause microstructural alterations to initiate fatigue failures in rolling elements under cyclic contact loading. To study the stress disturbances created by the inhomogeneity, a two-dimensional contact stress analysis is presented for a cylindrical indenter sliding on an elastic half-space containing an inhomogeneity of arbitrary shape. The boundary element method is used to analyze the contact problem, where actual contact boundary, contact pressure as well as tractions and displacements at inhomogeneity–substrate interface are determined by solving a set of integral equations numerically. Numerical results are presented to investigate effects and the stress disturbances caused by the inhomogeneity with various locations, sizes and material properties of inhomogeneity. The results also show that hard inclusions are more detrimental than soft deformable particles in rolling contact elements.