Effects and recommendations of crack tip modelling on compliance solutions
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Theoretical and Applied Fracture Mechanics
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Elastic unloading compliance is a common technique to determine instantaneous crack size in fracture mechanics properties such as resistance curves (R-curves) and fatigue crack growth. This technique uses a polynomial, developed using finite elements models, to correlate compliance with crack depth. In these models, crack tip is usually modeled with a blunt mesh (with a crack tip radius ρ) or a sharp mesh (with element size in the width direction l), and neither are standardized in the literature. This paper shows that both affect compliance, therefore potentially impacting results of fracture mechanics properties acquired from simulations. This paper focuses on how those parameters affects compliance in SE(B) models. Finally, a parameter φ that normalizes ρ or l with the width was developed and recommended values based on compliance convergence are suggested. Controlling φ may help to ensure reliable results in fracture mechanics models where compliance needs to be determined.
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ANDRADE, L.G.F.; MATTAR NETO, M.; DONATO, G.H.B. Effects and recommendations of crack tip modelling on compliance solutions. Theoretical and Applied Fracture Mechanics, v. 131, p. 1-7, 2024. DOI: 10.1016/j.tafmec.2024.104422. Disponível em: https://repositorio.ipen.br/handle/123456789/48124. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.