Abstract
Generally, analysis of surface erosion by solid-particle impact should be conducted by invoking the apparatus of fracture mechanics. However, conventional quasi-static modeling cannot provide explanations of many observed effects, because static criteria are inconsistent with the essential dynamics of erosion. Erosion processes are characterized by the action of very short dynamic stress pulses on surfaces. The possibility of fracture can be assessed only by means of criteria taking into account the transient nature of the fracture of solids. An efficient criterion for analyzing rapid fracture processes is based on the concept of latent time [1, 2]. For a defect-free material subject to erosion, the criterion is formulated as
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