{"title":"Crystal plasticity finite element analysis of 3D mixed-mode notch tip fields in a textured Mg alloy","authors":"Dhrubjyoti Baruah, R. Narasimhan","doi":"10.1016/j.ijsolstr.2024.113212","DOIUrl":null,"url":null,"abstract":"<div><div>In this work, crystal plasticity finite element simulations of notched symmetric and asymmetric four-point bend specimens of a rolled AZ31 magnesium alloy having basal texture are performed. The objective is to understand the 3D nature of mixed-mode notch tip fields in this alloy and to compare the numerical results with previously reported experiments. To assess anisotropy effects, the analysis is conducted for two notch orientations, as well as for a material obeying the <span><math><msub><mi>J</mi><mn>2</mn></msub></math></span> flow theory of plasticity, corresponding to one of the specimens. The macroscopic results agree quite well with experiments. Strong thickness variations of plastic slips, tensile twin volume fraction, and stresses are observed, which however depend on notch orientation and mode-mixity. Finally, the implications of the results for failure near the notch tip are discussed and corroborated with experimental observations.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"310 ","pages":"Article 113212"},"PeriodicalIF":3.4000,"publicationDate":"2024-12-30","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/S0020768324005717","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
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Abstract
In this work, crystal plasticity finite element simulations of notched symmetric and asymmetric four-point bend specimens of a rolled AZ31 magnesium alloy having basal texture are performed. The objective is to understand the 3D nature of mixed-mode notch tip fields in this alloy and to compare the numerical results with previously reported experiments. To assess anisotropy effects, the analysis is conducted for two notch orientations, as well as for a material obeying the flow theory of plasticity, corresponding to one of the specimens. The macroscopic results agree quite well with experiments. Strong thickness variations of plastic slips, tensile twin volume fraction, and stresses are observed, which however depend on notch orientation and mode-mixity. Finally, the implications of the results for failure near the notch tip are discussed and corroborated with experimental observations.
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.
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