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۱Dependence of pile–up on elastic deformation, penetration depth and contact friction during sliding indentation
اطلاعات انتشار: دوازدهمین کنفرانس ملی مهندسی ساخت و تولید ایران، سال
تعداد صفحات: ۴
A three–dimensional finite element model (FEM) for describing the elastic and plastic behavior of coated system during sliding indentation has been developed. Influence of elastic deformation on pile–up and dependence of pile–up on penetration depth, contact friction were analyzed. In this case a wide range of materials with different elastic modulus, yield stresses, strainhardening exponents, and friction coefficients were examined. Results show that during the process, after initially sinking–in at small depths of penetration, the pile–up for many materials evolves and increases gradually as the indenter is driven in to the material. Even when deformation enters the fully developed plastic stage, the pile–up geometry continues to change in manners that can significantly affects the contact area. It is also shown that contact friction affects considerably the pile–up heights. Meanwhile this study develop a comprehensive framework for calculating the elastic–plastic stresses and strains during sliding indentation of coated systems.<\div>
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