期刊
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
卷 204, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jcsr.2023.107852
关键词
S690 high-strength steel; Ductile fracture; Hosford-Coulomb model; Stress triaxiality; Lode angle parameter; Strain rate
This study investigates the stress-state and strain-rate dependent ductile fracture initiation property of S690 high-strength steel through experiments and simulations. Various types of specimens are tested, and the Cowper-Symonds-type rate correction term is considered in the yield function and ductile fracture initiation locus. Linear and non-linear damage accumulation evolutions are discussed for different loading conditions. The proposed stress-state and strain-rate dependent ductile fracture model is validated through a hybrid experimental and numerical approach.
The stress-state and strain-rate dependent ductile fracture initiation property of S690 high-strength steel is investigated in this study through experiments and simulations. A total of 14 specimens, including uniaxial tension, notched tension, central hole, plane strain, and in-plane pure shear specimens, are tested in the experimental programme. The Cowper-Symonds-type rate correction term is considered in the yield function and the three-dimensional ductile fracture initiation locus. Linear and non-linear damage accumulation evolution laws are discussed for specimens under various degrees of non-proportional loading. The extended model with the damage evolution is implemented in a user-defined material subroutine, VUMAT, and applied to the nu-merical simulations. A hybrid experimental and numerical approach is adopted to calibrate the key parameters. Then, a stress-state and strain-rate dependent ductile fracture model of S690 high-strength steel is proposed and validated in this study.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据