A phase-field model for fatigue crack growth

By Y. Lo, Michael J. Borden, Krishnaswamy Ravi-Chandar, Chad M. Landis. Journal of the mechanics and physics of solids, 2019

168 citations recorded by the source corpus.

Abstract A phase-field model is presented for the study of fatigue crack growth. A crack growth viscosity parameter is introduced into the standard phase-field model for brittle fracture to account for rate- or cycle-dependent crack growth phenomena. A modified J-integral is developed to demonstrate how the phase-field approach can be used to generate Paris-law type crack growth rates. In order to model more general crack growth versus applied loading behaviors that are not a single simple Paris-law, steady-state finite element calculations are performed to calibrate fits of the phase-field model to measured crack growth rates found in da/dN versus ΔK curves. Transient time- or cycle-dependent calculations are performed and compared to experimental measurements on samples where crack turning is induced by the presence of a hole in the vicinity of the crack. A three-dimensional example with turning of the crack front is also computed illustrating the capabilities of the phase-field approach for complex crack paths.

Subfields: Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/0a8ecdb092a4f5be921ab4c3212ebecebbda3429

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In Mechanical Engineering

In Mechanics of Materials

Citations in the corpus

Toughness or strength? Regularization in phase-field fracture explained by the coupled criterion (2020, background): “, 2012), fatigue (Lo et al., 2019; Mesgarnejad et al., 2019), interfacial damages (Nguyen et al.”