Phase-field simulation of ductile fracture in shell structures

被引：36
作者：
Proserpio, Davide [1 ,2 ]
Ambati, Marreddy [3 ]
De Lorenzis, Laura [4 ]
Kiendl, Josef [1 ,2 ]
机构：
[1] Bundeswehr Univ Munich, Inst Engn Mech & Struct Anal, Werner Heisenberg Weg 39, D-85577 Neubiberg, Germany
[2] Norwegian Univ Sci & Technol, Dept Marine Technol, Otto Nielsens Veg 10, N-7052 Trondheim, Norway
[3] Tech Univ Dresden, Inst Solid Mech, George Bahr Str 3c, D-01069 Dresden, Germany
[4] Swiss Fed Inst Technol, Dept Mech & Proc Engn, Tannenstr 3, CH-8092 Zurich, Switzerland
来源：
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 2021年 / 385卷
基金：
欧洲研究理事会;
关键词：
Phase-field model; Ductile fracture; Isogeometric; Shell; Multipatch; Adaptive refinement; GRADIENT DAMAGE MODELS; BRITTLE-FRACTURE; CRACK-PROPAGATION; FORMULATION; PLATES; DEGRADATION; PLASTICITY; NURBS;
D O I：
10.1016/j.cma.2021.114019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, a computational framework for simulating ductile fracture in multipatch shell structures is presented. A ductile fracture phase-field model at finite strains is combined with an isogeometric Kirchhoff-Love shell formulation. For the application to complex structures, we employ a penalty approach for imposing, at patch interfaces, displacement and rotational continuity and C-0 and C-1 continuity of the phase-field, the latter required if a higher-order phase-field formulation is adopted. We study the mesh dependency of the numerical model and we show that mesh refinement allows for capturing important features of ductile fracture such as cracking along shear bands. Therefore, we investigate the effectiveness of a predictor- corrector algorithm for adaptive mesh refinement based on LR NURBS. Thanks to the adoption of time- and space-adaptivity strategies, it is possible to simulate the failure of complex structures with a reasonable computational effort. Finally, we compare the predictions of the numerical model with experimental results. (C) 2021 The Author(s). Published by Elsevier B.V.
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页数：28
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