A phase field model with plastic history field for fracture of elasto-plastic materials. (1st June 2022)

• Record Type: Journal Article
• Authors: Shi, Qianyu; Yu, Hongjun; Guo, Licheng; Hao, Liulei; Huang, Kai
• Is Part Of: Engineering fracture mechanics. Volume 268(2022)
• Publication Date: 2022-06-01
• Subjects: Fracture phase-field -- Crack propagation -- Elasto-plastic materials -- Plastic history field; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2022.108447
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: Phase field model in elasto-plastic material was implemented via Abaqus UEL and UMAT subroutines. Plastic history field was proposed to achieve the aim of tension-compression split. Numerical examples for verification were simulated under monotonic and cyclic loadings. Abstract: Fracture phase-field models have been integrated with plasticity to describe crack propagation in elasto-plastic materials in numerous studies. However, even with the elastic energy decomposition method, the phase-field evolution may produce unrealistic crack patterns for elasto-plastic materials under compressive stresses. In this study, we propose a plastic history field using the staggered algorithm scheme to perform the energy decomposition. Then, several numerical examples are simulated from a single element to the widely used specimen configurations. The results indicate that our model, compared with the conventional phase-field model, can better prevent crack growth for elasto-plastic materials under compressive stress states and can simulate crack patterns that are more consistent with experiments.