Strain-rate and stress-state dependent ductile fracture model of S690 high-strength steel

被引：24
|
作者：
Shang, Mingxu [1 ,2 ]
Yang, Hua [1 ,2 ]
Su, Andi [1 ,2 ]
Wang, Yuyin [1 ,2 ]
机构：
[1] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Minist Educ, Key Lab Struct Dynam Behav & Control, Harbin 150090, Peoples R China
来源：
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | 2023年 / 204卷
基金：
中国国家自然科学基金; 黑龙江省自然科学基金;
关键词：
S690 high-strength steel; Ductile fracture; Hosford-Coulomb model; Stress triaxiality; Lode angle parameter; Strain rate; CONSTITUTIVE MODEL; BEHAVIOR; PLASTICITY; TRIAXIALITY; CONNECTIONS; INITIATION; SHEETS;
D O I：
10.1016/j.jcsr.2023.107852
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
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.
引用
收藏
页数：13
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