Please use this identifier to cite or link to this item:
Title: Adaptive fourth-order phase-field modeling of ductile fracture using an isogeometric-meshfree approach
Authors: Li, Weidong
Ambati, Marreddy
Nguyen-Thanh, Nhon
Du, Hejun
Zhou, Kun
Keywords: Engineering::Mechanical engineering
Issue Date: 2023
Source: Li, W., Ambati, M., Nguyen-Thanh, N., Du, H. & Zhou, K. (2023). Adaptive fourth-order phase-field modeling of ductile fracture using an isogeometric-meshfree approach. Computer Methods in Applied Mechanics and Engineering, 406, 115861-.
Journal: Computer Methods in Applied Mechanics and Engineering
Abstract: The fourth-order phase-field modeling of ductile fracture in elastic–plastic materials is performed via an adaptive isogeometric-meshfree approach. In the developed phase-field model, the total energy functional consists of the elastic contribution and the dissipated contribution because of fracture and plasticity. The coupling of the plasticity to fracture is implemented by a degradation function that is applied to the elastic energy. The present fourth-order phase-field model is capable of relaxing the mesh size requirements while accurately regularizing sharp cracks. To further enhance the computational efficiency, the isogeometric-meshfree approach is adopted for the numerical implementation of the phase-field model within a staggered computational framework. The developed approach can flexibly implement the C1-continuity of a crack phase field that is required by the fourth-order model. Moreover, an adaptive mesh refinement strategy is developed, which includes the gradient-based refinement indicators and the field transfer operators. Numerical simulations of a series of representative cases show that the developed fourth-order model can accurately and efficiently capture complex ductile fracture patterns including plastic localization, crack initiation, propagation, and merging, which demonstrates the reliability of the adaptive fourth-order phase-field modeling of ductile fracture.
ISSN: 0045-7825
DOI: 10.1016/j.cma.2022.115861
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2022 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

Citations 20

Updated on Jul 13, 2024

Web of ScienceTM
Citations 50

Updated on Oct 27, 2023

Page view(s)

Updated on Jul 13, 2024

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.