5/29/2023 0 Comments Dmesh crack![]() ![]() ![]() If a crack is detected in a component, an assessment is required in accordance with a respective code or analysis whether that part can continue to function or it should be replaced. The structural significance of such flaws particularly cracks needs to be assessed to prevent failure of the component during the service life. Based on the results, a new alignment and combination rule is proposed.Ĭrack interaction crack growth extended finite element method brittle fractureĮngineering structures may contain flaws during the fabrication process or plant operation. This method enables the domain to be modeled by finite elements without explicitly meshing the crack surfaces, and hence crack propagation simulations can be carried out without remeshing. The extended finite element method has been utilized to model the problem. ![]() In addition, crack growth behavior is simulated based on linear elastic fracture mechanics approach. The effect of cracks distances and crack lengths on stress intensity factors is evaluated. Following, to investigate the effects of the interaction of cracks, brittle fracture of a plate containing two offset cracks is simulated. First, this study introduces the current alignment and combination rules for through-wall cracks. In the current standards, multiple cracks are treated as an equivalent single crack if the distance between two cracks satisfies a prescribed criterion. Assessment of the interaction behavior is based on the evaluation of alignment and combination of these multiple flaws. These flaws will in some circumstances lead to more severe effects than single flaw alone. Multiple flaws are frequently occurred in actual components, such as pressure vessels and power plants. ![]()
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