An FFT-based crystal plasticity phase-field model for micromechanical fatigue cracking based on the stored energy density

2023/04/03 by Lucarini, Sergio, Dunne, Fionn P. E., Martínez-Pañeda, Emilio · 2 citations
#Applied Physics (physics.app-ph) #Computational Engineering #FOS: Computer and information sciences #FOS: Physical sciences #Finance #Materials Science (cond-mat.mtrl-sci) #and Science (cs.CE)

paper · doi:10.48550/arxiv.2304.01125

Abstract

A novel FFT-based phase-field fracture framework for modelling fatigue crack initiation and propagation at the microscale is presented. A damage driving force is defined based on the stored energy and dislocation density, relating phase-field fracture with microstructural fatigue damage. The formulation is numerically implemented using FFT methods to enable modelling of sufficiently large, representative 3D microstructural regions. The early stages of fatigue cracking are simulated, predicting crack paths, growth rates and sensitivity to relevant microstructural features. Crack propagation through crystallographic planes is shown in single crystals, while the analysis of polycrystalline solids reveals transgranular crack initiation and crystallographic crack growth.

Cited by

• Effective toughness estimation by FFT based phase field fracture: application to composites and polycrystals
• Jacobi-accelerated FFT-based solver for smooth high-contrast data

Related

• Microscale Fracture Modeling using Phase-Field and FFT-based Homogenization
• An efficient phase-field model for fatigue fracture in ductile materials
• A Phase-Field Approach to Fracture and Fatigue Analysis: Bridging Theory and Simulation
• A crack-length control technique for phase field fracture in FFT homogenization
• Phase-field models for ductile fatigue fracture