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Evolution of real area of contact due to combined normal load and sub-surface straining in sheet metal

Friction 2021年第4期9卷 840-855页

作者： Meghshyam SHISODE Javad HAZRAT Tanmaya MISHRA Matthijn DE ROOIJ Ton VAN DEN BOOGAAED Nonlinear Solid Mechanics Faculty of Engineering TechnologyUniversity of TwenteEnschede 7522 NBThe Netherlands Surface Technology and Tribology Faculty of Engineering TechnologyUniversity of TwenteEnschede 7522 NBThe Netherlands

Understanding asperity flattening is vital for a reliable macro-scale modeling of friction and *** sheet metal forming processes,sheet surface asperities are deformed due to contact forces between the tools and the *** addition,as the sheet metal is strained while retaining the normal load,the asperity deformation increases *** of the asperities determines the real area of contact which influences the friction and wear at the tool-sheet metal *** real area of contact between two contacting rough surfaces depends on type of loading,material behavior,and topography of the contacting *** this study,an experimental setup is developed to investigate the effect of a combined normal load and sub-surface strain on real area of *** and zinc coated steel sheets(GI)with different coating thicknesses,surface topographies,and substrate materials are used in the experimental *** element(FE)analyses are performed on measured surface profiles to further analyze the behavior observed in the experiments and to understand the effect of surface topography,and coating thickness on the evolution of the real area of ***,an analytical model is presented to determine the real area contact under combined normal load and sub-surface *** results show that accounting for combined normal load and sub-surface straining effects is necessary for accurate predictions of the real area of contact.

关键词： asperity flattening real area of contact sub-surface strain zinc coating sheet metal forming

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