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Transition from Plastic Shearing to Fracture of Asperity Junctions: Role of a Critical Aspect Ratio

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Abstract

Material loss can result through sliding contact between solids, primarily due to wear process. Failure of interlocking asperities in contact, which can occur as a fracture-induced or plastic shearing mechanism, is a significant contributor in material wear. We developed an analytical model to predict asperity junction failure mechanisms as a function of material properties (fracture toughness and shear strength) and geometrical parameters (asperity height and width). The failure causes fracture-induced and plastic shearing below and above a threshold aspect ratio, respectively. This was validated by a wide range of configurations and materials using both finite element simulations and documented data from literature.

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  1. SDU Mechatronics and Centre for Industrial Mechanics, Department of Mechanical and Electrical Engineering, University of Southern Denmark, 6400, Sønderborg, Denmark

    Mohammad Malekan

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Malekan, M. Transition from Plastic Shearing to Fracture of Asperity Junctions: Role of a Critical Aspect Ratio. Tribol Lett 71, 26 (2023). https://doi.org/10.1007/s11249-023-01699-3

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