Abstract
PurposeThe fracture mechanism of S-07 steel was investigated by observing the fracture surface of the specimens with scanning electron microscope (SEM). Furthermore, the overall elastic–plastic behaviors and the stress state evolution during the loading procedure of all specimens were simulated by FE analysis to obtain the local strain at crack nucleated location and the average triaxiality of each type of specimen.Design/methodology/approachThree types of tests under various stress states were performed to study the ductile fracture characteristics of S-07 high strength steel in quasi-static condition.FindingsUnder tensile and torsion loading conditions, S-07 steel exhibits two distinctive rupture mechanisms: the growth and internal necking of voids governs the rupture mechanism in tension dominated loading mode, while the change of void shape and internal shearing in the ligaments between voids dominants for shear conditions.Originality/valueThe failure criterion for S-07 steel considering the influence of the triaxial stress state was established.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science,Modeling and Simulation
Reference43 articles.
1. A comparative study of three groups of ductile fracture loci in the 3D space;Engineering Fracture Mechanics,2015
2. A new model of metal plasticity and fracture with pressure and Lode dependence;International Journal of Plasticity,2008
3. On fracture locus in the equivalent strain and stress triaxiality space;International Journal of Mechanical Sciences,2004
4. Studies in large plastic flow and fracture with special emphasis on the effects of hydrostatic pressure,1964
5. A modified yield function for modeling of the evolving yielding behavior and micro-mechanism in biaxial deformation of sheet metals;International Journal of Plasticity,2020
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献