Study on single-cell contact model of thick-walled cellular solid
Study on single-cell contact model of thick-walled cellular solid
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厚壁多孔固体单细胞接触模型研究
DOI：
10.1016/j.ijmecsci.2011.08.007
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发表时间：
2011-10
影响因子：
7.3
通讯作者：
Fang Xie Zuomin Liu
中科院分区：
文献类型：
--
作者：
Fang Xie Zuomin Liu
将经典赫兹理论与等效曲梁法相结合，提出了一种研究厚壁蜂窝体接触力学的解析方法。与有限元和实验方法相比，该方法扩展了Hertz理论的适用范围，并用于研究孔隙率对接触压力和局部应力分布的影响。结果表明，在给定载荷下，孔隙率的增加对最大接触压力和接触半宽的影响不大。但由于胞壁的弯曲变形，导致总径向位移和局部应力显著增加。因此，蜂窝状固体接触疲劳寿命的提高主要取决于孔隙率以及由于弯曲应力的影响而引起的次表面应力分布的相应变化，而不是接触变形。厚壁蜂窝固体的接触力学解析解也适用于某些工程应用，如滚动轴承中的空心圆柱体。
An analytical method was proposed by combining the classical Hertz theory with the method of an equivalent curved beam to investigate the contact mechanics of a thick-walled cellular solid. This method extended the range of applicability of Hertz theory and was applied to investigate the influence of porosity on the contact pressure and local stress distribution compared with finite element and experimental methods. The results show that the increase of the porosity had little effect on the maximum contact pressure and contact half-width under the given load. However, it resulted in a marked increase of the total radial displacement and local stress due to the bending deformation of the cell wall. Therefore, the improvement of contact fatigue life of cellular solids mainly depends on porosity and the corresponding change of subsurface stress distribution due to the influence of bending stress rather than contact deformation. The analytical contact mechanics solution for the thick-walled cellular solid examined is also applicable to some engineering applications, such as hollow cylinder in rolling elements bearings.
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DOI：
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发表时间：
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影响因子：
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