{"title":"Numerical Modeling of Stress-State Dependent Damage Evolution and Ductile Fracture of Austenitic Stainless Steel","authors":"Myung-Sung Kim , You-Hee Cho , Hwasup Jang","doi":"10.1016/j.ijsolstr.2025.113439","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, a stress-state-dependent elastoplastic-damage coupled constitutive model was developed and implemented into a commercial FEA program to predict the plastic behavior and fracture of 304L stainless steel. Damage evolution was experimentally quantified using unloading–reloading tensile tests, and Bonora’s damage model was applied to describe this evolution. The uncoupled damage model accurately captured the force–displacement response of smooth tensile specimens but exhibited up to an 8 % discrepancy in predicting the maximum load for notched specimens. In contrast, the coupled damage model, which accounted for stress triaxiality-dependent damage evolution, reduced this discrepancy to just 1.8 %. This study demonstrates that 304L stainless steel sheets exhibit a true stress–strain relationship that depends on stress triaxiality, and disregarding this factor can lead to notable differences in fracture predictions.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"318 ","pages":"Article 113439"},"PeriodicalIF":3.8000,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Solids and Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0020768325002252","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, a stress-state-dependent elastoplastic-damage coupled constitutive model was developed and implemented into a commercial FEA program to predict the plastic behavior and fracture of 304L stainless steel. Damage evolution was experimentally quantified using unloading–reloading tensile tests, and Bonora’s damage model was applied to describe this evolution. The uncoupled damage model accurately captured the force–displacement response of smooth tensile specimens but exhibited up to an 8 % discrepancy in predicting the maximum load for notched specimens. In contrast, the coupled damage model, which accounted for stress triaxiality-dependent damage evolution, reduced this discrepancy to just 1.8 %. This study demonstrates that 304L stainless steel sheets exhibit a true stress–strain relationship that depends on stress triaxiality, and disregarding this factor can lead to notable differences in fracture predictions.
期刊介绍:
The International Journal of Solids and Structures has as its objective the publication and dissemination of original research in Mechanics of Solids and Structures as a field of Applied Science and Engineering. It fosters thus the exchange of ideas among workers in different parts of the world and also among workers who emphasize different aspects of the foundations and applications of the field.
Standing as it does at the cross-roads of Materials Science, Life Sciences, Mathematics, Physics and Engineering Design, the Mechanics of Solids and Structures is experiencing considerable growth as a result of recent technological advances. The Journal, by providing an international medium of communication, is encouraging this growth and is encompassing all aspects of the field from the more classical problems of structural analysis to mechanics of solids continually interacting with other media and including fracture, flow, wave propagation, heat transfer, thermal effects in solids, optimum design methods, model analysis, structural topology and numerical techniques. Interest extends to both inorganic and organic solids and structures.