An efficient phase-field model for fatigue fracture in ductile materials

By M. Seiler, T. Linse, Peter Hantschke, Markus Kastner. Engineering Fracture Mechanics, 2019

157 citations recorded by the source corpus.

Fatigue fracture in ductile materials, e. g. metals, is caused by cyclic plasticity. Especially regarding the high numbers of load cycles, plastic material models resolving the full loading path are computationally very demanding. Herein, a model with particularly small computational effort is presented. It provides a macroscopic, phenomenological description of fatigue fracture by combining the phase-field method for brittle fracture with a classic durability concept. A local lifetime variable is obtained, which degrades the fracture resistance progressively. By deriving the stress-strain path from cyclic material characteristics, only one increment per load cycle is needed at maximum. The model allows to describe fatigue crack initiation, propagation and residual fracture and can reproduce Paris behaviour.

Subfields: Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/4610bd9e943665e968d986e35fbfae1f19991a8e

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In Mechanical Engineering

In Mechanics of Materials

Citations in the corpus

A general phase-field model for fatigue failure in brittle and ductile solids (2021, methodology): “A more intuitive approach has been very recently proposed by Alessi et al. [50], Carrara et al. [51], Seiler et al. [52] and Aldakheel et al. [53] where not only the stiffness is being degraded due to phase-field evolution, but also the fracture energy on the account of strain or stress history.”