Strength of adhesive contacts: Influence of contact geometry and material gradients
Strength of adhesive contacts: Influence of contact geometry and material gradients作者机构：Institute of Mechanics Technische Universit(a)t Berlin Berlin 10623 GermanyNational Research Tomsk Polytechnic University Tomsk 634050 Russia Institute of Mechanics Technische Universit(a)t Berlin Berlin 10623 Germany
出 版 物：《Friction》 (摩擦（英文版）)
年 卷 期：2017年第5卷第3期
页 面：308-325页
核心收录：
学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）]
基 金：support from DFG
主 题：adhesion boundary element method (BEM) flat-ended indenters,gradient media
摘 要：The strength of an adhesive contact between two bodies can strongly depend on the macroscopic and microscopic shape of the *** the past,the influence of roughness has been investigated ***,even in the presence of perfectly smooth surfaces,geometry can come into play in form of the macroscopic shape of the contacting *** we present numerical and experimental results for contacts of rigid punches with flat but oddly shaped face contacting a soft,adhesive *** it is carefully pulled off,we find that in contrast to circular shapes,detachment occurs not instantaneously but detachment fronts start at pointed comers and travel inwards,until the final configuration is reached which for macroscopically isotropic shapes is almost *** elongated indenters,the final shape resembles the original one with rounded *** describe the influence of the shape of the stamp both experimentally and *** simulations are performed using a new formulation of the boundary element method for simulation of adhesive contacts suggested by Pohrt and *** is based on a local,mesh dependent detachment criterion which is derived from the Griffith principle of balance of released elastic energy and the work of *** validation of the suggested method is made both by comparison with known analytical solutions and with *** method is applied for simulating the detachment of flat-ended indenters with square,triangle or rectangular shape of cross-section as well as shapes with various kinds of faults and to brushes .The method is extended for describing power-law gradient media.
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