EFFECT OF SLIDING AND HAMMERING CONTACT FOR CRACK GENERATION AND FRACTURE TOUGHNESSS IN SCRATCH TEST
Keywords:, Scratch test, Coating, Fracture mechanism, Elastic-Plastic behavior, Abaqus
Scratch test is one of widely used, fast, and effective methods to obtain the critical loads that are related to adhesion properties of coating. The contact situation in a scratch tester is the combination of the hammering and sliding contact. Due to the increasing load of the stylus over an elastic-plastic zone, the surface defect will occur and lead to the creation of some first visible angular cracks in the coating. As a result, this phenomenon will affect to the crack generation and failure mechanism. A three-dimensional finite element model (FEM) for describing the stress-strain behavior under stylus loading was built to get the explain the effect of contact forces for the fracture mechanism.
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