Size dependence of energy storage and dissipation in a discrete dislocation plasticity analysis of static friction

V.S. Deshpande; A. Needleman; E. Van der Giessen

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Size dependence of energy storage and dissipation in a discrete dislocation plasticity analysis of static friction

机译：静摩擦离散位错塑性分析中能量存储和耗散的尺寸依赖性

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The initiation of frictional sliding between a flat-bottomed indenter and a planar single crystal substrate is analyzed using discrete dislocation plasticity. Plastic deformation is modeled through the motion of edge dislocations in an elastic solid with the lattice resistance to dislocation motion, dislocation nucleation, dislocation interaction with obstacles and dislocation annihilation incorporated through a set of constitutive rules. The adhesion between the indenter and the substrate is modeled using a shear traction versus sliding displacement cohesive relation. The evolution of the energy storage and dissipation are calculated as a function of contact size.

机译：使用离散位错可塑性分析了平底压头和平面单晶衬底之间的摩擦滑动的开始。塑性变形是通过弹性固体中位错的运动建模的，其中位错抵抗位错运动，位错成核，位错与障碍的相互作用以及位错an灭（通过一组构造规则）。压头与基底之间的粘附力是使用剪切牵引力与滑动位移内聚关系建模的。能量存储和耗散的演变是根据触点尺寸来计算的。

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《Materials Science and Engineering. A, Structural Materials》 |2005年第7期|p.393-396|共4页
作者
V.S. Deshpande; A. Needleman; E. Van der Giessen;
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作者单位

Cambridge University, Department of Engineering, Trumpington Street, Cambridge CB2 1PZ, UK;

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原文格式 PDF
正文语种 eng
中图分类工程材料学;
关键词
dislocations; mechanical properties; friction; plastic; size effects; computer simulation;

机译：位错;力学性能;摩擦;塑性;尺寸效应;计算机仿真;

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Size dependence of energy storage and dissipation in a discrete dislocation plasticity analysis of static friction

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