Onset of detachment in adhesive contact of an elastic half-space and flat-ended punches with non-circular shape: analytic estimates and comparison with numeric analysis

Onset of detachment in adhesive contact of an elastic half-space and flat-ended punches with non-circular shape: analytic estimates and comparison with numeric analysis
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弹性半空间和平端非圆形冲头粘合接触中的脱离开始:分析估计以及与数值分析的比较

DOI:
10.1088/1361-6463/aab28b
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发表时间:
2018
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
Valentin L.
Valentin L.
中科院分区:
--
文献类型:
--
作者:
Argatov;Valentin L.

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Popov,Pohrt和Li(PPL)最近在《摩擦》杂志上发表的一篇论文使用数值,分析和实验方法研究了不寻常形状的平压头的粘合接触。在此基础上,我们分析了已知解析解的一些特殊情况。在PPL文件中,我们考虑的约翰逊-肯德尔-罗伯茨近似的粘合剂接触。根据能量平衡,不同的上限和下限的估计获得的某些积分特性的接触面积。椭圆冲头以及两个圆形冲头系统的特殊情况被认为是。第一临界力(脱离过程开始时的力)的理论估计通过使用粘合剂边界元法的数值模拟来确认。结果表明,简单的近似的拉脱力,基于接触的霍尔姆半径和接触面积,大大高估了最大的粘合力。
A recent paper by Popov, Pohrt and Li (PPL) in Friction investigated adhesive contacts of flat indenters in unusual shapes using numerical, analytical and experimental methods. Based on that paper, we analyze some special cases for which analytical solutions are known. As in the PPL paper, we consider adhesive contact in the Johnson–Kendall–Roberts approximation. Depending on the energy balance, different upper and lower estimates are obtained in terms of certain integral characteristics of the contact area. The special cases of an elliptical punch as well as a system of two circular punches are considered. Theoretical estimations for the first critical force (force at which the detachment process begins) are confirmed by numerical simulations using the adhesive boundary element method. It is shown that simpler approximations for the pull-off force, based both on the Holm radius of contact and the contact area, substantially overestimate the maximum adhesive force.
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发表时间: 2014-08-01
影响因子: 3.9
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