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Three-dimensional phase-field modeling of the fracture constraint effects in Ti6Al4V alloy fabricated by laser powder bed fusion

文献类型：期刊论文

作者Xiao YM(肖应梦)2,3; Sun JY(孙经雨)3; Berto, Filippo1; Qian GA(钱桂安)3
刊名ENGINEERING FRACTURE MECHANICS
出版日期2025-07-25
卷号324页码:19
关键词Phase-field method Constraint effect Fracture toughness Ti6Al4V alloy Additive manufacturing
ISSN号0013-7944
DOI10.1016/j.engfracmech.2025.111221
通讯作者Sun, Jingyu(sunjingyu@imech.ac.cn) ; Qian, Guian(qianguian@imech.ac.cn)
英文摘要The effect of constraint on fracture toughness is a critical issue in assessing the integrity of engineering structures. The brittle phase-field model (PFM) for fracture has been extended to the elastic-plastic solids. This study aims to enhance the understanding of constraint effects on the fracture behavior of an additively manufactured Ti6Al4V alloy. The fracture behavior of three-dimensional (3D) compact tension (CT) specimens with varying crack lengths and thicknesses is investigated experimentally and numerically. The results demonstrate that phase-field modeling is an effective tool for evaluating the fracture constraint effects of 3D cracked metalic material under mode I loading. With a single set of parameters, the elastic-plastic PFM accurately captures both the peak load and the post-peak softening behavior of specimens subjected to different constraint levels. While the elastic PFM can adequately assess peak loads in elastic-plastic materials, it lacks the capability to replicate the softening curve of the material. Loading affects in-plane constraints more than out-of-plane constraints, and the smaller the in-plane constraints, the higher the specimen fracture toughness and the longer the crack extension under the same loading conditions. In addition, the PFM can capture the necking effect at the crack tip and the crack propagation profiles, in particular, crack nucleation, propagation and even branching on the specimen surface can be accurately and effectively predicted by the elastic-plastic PFM. This work is beneficial in determining the fracture toughness of 3D elastic-plastic materials under different levels of constraint and demonstrates the feasibility of using PFM to study the fracture behavior of complex structures in the future.
分类号一类
WOS关键词CRACK BORDER FIELD ; TRIAXIALITY PARAMETER ; BRITTLE-FRACTURE ; FORMULATION ; FAMILY ; SIZE
资助项目National Natural Science Foundation of China[11932020] ; National Natural Science Foundation of China[12272377] ; International Partnership Program for Grand Challenges of Chinese Academy of Sciences[025GJHZ2023092GC] ; Strategic Priority Research Program of Chinese Academy of Science[XDB0620303]
WOS研究方向Mechanics
语种英语
WOS记录号WOS:001499255800003
资助机构National Natural Science Foundation of China ; International Partnership Program for Grand Challenges of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Science
其他责任者孙经雨，钱桂安
源URL[http://dspace.imech.ac.cn/handle/311007/101739]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Sapienza Univ Rome, Dept Chem Engn Mat Environm, I-00184 Rome, Italy
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Xiao YM,Sun JY,Berto, Filippo,et al. Three-dimensional phase-field modeling of the fracture constraint effects in Ti6Al4V alloy fabricated by laser powder bed fusion[J]. ENGINEERING FRACTURE MECHANICS,2025,324:19.
APA 肖应梦,孙经雨,Berto, Filippo,&钱桂安.(2025).Three-dimensional phase-field modeling of the fracture constraint effects in Ti6Al4V alloy fabricated by laser powder bed fusion.ENGINEERING FRACTURE MECHANICS,324,19.
MLA 肖应梦,et al."Three-dimensional phase-field modeling of the fracture constraint effects in Ti6Al4V alloy fabricated by laser powder bed fusion".ENGINEERING FRACTURE MECHANICS 324(2025):19.

入库方式： OAI收割

来源：力学研究所

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