Discrete dislocation plasticity (DDP) calculations are carried out to investigate the response of a single crystal contacted by a rigid sinusoidal asperity under sliding loading conditions to look for causes of microstructure change in the dislocation structure. The mechanistic driver is identified as the development of lattice rotations and stored energy in the subsurface, which can be quantitatively correlated to recent tribological experimental observations. Maps of surface slip initiation and substrate permanent deformation obtained from DDP calculations for varying contact size and normal load suggest ways of optimally tailoring the interface and microstructural material properties for various frictional loads.

进行离散位错塑性 (DDP) 计算以研究单晶在滑动加载条件下与刚性正弦粗糙体接触的响应，以寻找位错结构中微观结构变化的原因。机械驱动被确定为地下晶格旋转和储存能量的发展，这可以与最近的摩擦学实验观察定量相关。从不同接触尺寸和法向载荷的 DDP 计算中获得的表面滑移起始和基板永久变形图提出了针对各种摩擦载荷优化调整界面和微观结构材料特性的方法。