原文传递
Phase-Field Description of Ductile Fracture in Structural Steel under Cyclic Loading
| 题名： | Phase-Field Description of Ductile Fracture in Structural Steel under Cyclic Loading |
| 正文语种： | eng |
| 作者： | Ioannis Koutromanos;Adrian Tola-Tola;Matthew R. Eatherton |
| 作者单位： | Virginia Polytechnic Institute and State Univ.;Virginia Polytechnic Institute and State Univ.;Virginia Polytechnic Institute and State Univ. |
| 关键词： | Phase-field model;Cyclic loading;Ductile fracture;Finite element model;Low-cycle fatigue (LCF) |
| 摘要： | Abstract This paper presents analysis of fracture in structural steel subjected to cyclic loads, which is of paramount importance for evaluating the safety of steel buildings exposed to extreme events such as strong earthquakes. The analysis relies on the phase-field concept to describe the formation and propagation of cracks in a solid body, in conjunction with a large-deformation description of the motion and an elastoplastic constitutive law having nonlinear isotropic and kinematic hardening to account for the material hysteretic response. The evolution of the phase-field is driven by a low-cycle fatigue criterion, aimed to phenomenologically describe the effect of irreversible processes ultimately leading to ductile fracture. The proposed modeling scheme is used in the simulation of experimental tests on circumferentially notched steel coupons tested by the authors, and its capability to capture fracture occurrence, as well as cyclic crack opening and closing, is demonstrated. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 7 |
| 页码： | 04022073.1-04022073.17 |
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