Analytical and Numerical Models for Tangential Stiffness of Rough Elastic Contacts
Analytical and Numerical Models for Tangential Stiffness of Rough Elastic Contacts
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DOI：
10.1007/s11249-012-0049-y
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发表时间：
2013-01-01
影响因子：
3.2
通讯作者：
Dini, D.
中科院分区：
文献类型：
--
作者：
Medina, S.;Nowell, D.;Dini, D.
本文考虑粗糙表面的弹性接触，并开发了一个简单的解析表达式的接触刚度切向载荷下，它预测的接触刚度是成正比的法向载荷和杨氏模量无关。该模型的预测相比，一个完整的数值分析的粗糙的弹性接触的有限尺寸。这两种方法被认为是在低负荷下，当粗糙间距是大的，很好的协议，但数值方法预测低得多的刚度在中等和高负荷。结果表明，整体刚度不能超过等效光滑接触，并提出了一种简单的方法来修改的分析方法，并验证。
The paper considers elastic contact of rough surfaces and develops a simple analytical expression for the stiffness of the contact under tangential loading, which predicts that the contact stiffness is proportional to normal load and independent of Young's Modulus. The predictions of this model are compared to a full numerical analysis of a rough elastic contact of finite size. The two approaches are found to be in good agreement at low loads, when the asperity spacing is large, but the numerical approach predicts much lower stiffnesses at medium and high loads. It is shown that the overall stiffness cannot exceed that of the equivalent smooth contact, and a simple means of modifying the analytical approach is proposed and validated.