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We investigated the wear formation during a single-asperity sliding against a rigid substrate using molecular dynamics simulations. Two distinct wear mechanisms were observed: low-load atomic wear (isolated debris atoms or clusters) and high-load plastic wear (collective debris formation from plastic flow). The atomic wear rate depends on the normal stress exponentially, in agreement with the mechanically...
Molecular dynamics simulations were carried out to investigate the wear formation of a truncated-cone-shaped tip sliding against a rigid flat substrate. Under a constant normal load, the worn volume of the tip increases sub-linearly with the sliding distance, which holds true for three distinct debris definitions (geometry-based, material-transfer-based and displacement-based). Under a constant normal...
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