{"title":"Dislocation dipole confinement in a free-standing layer","authors":"Jérôme Colin","doi":"10.1016/j.mechrescom.2025.104384","DOIUrl":null,"url":null,"abstract":"<div><div>The equilibrium positions of a dipole of edge dislocations embedded in a free-standing layer and symmetrically distributed with respect to the structure center has been theoretically investigated from a Peach–Koehler force analysis. A critical “size” ratio between the dislocation spacing and the layer thickness has been determined below which, in addition to the aligned stable configuration, two shifted dislocation configurations are present, one stable and one unstable. Beyond this critical ratio, only the unstable aligned configuration remains, demonstrating the combined effect of the spatial confinement and dislocation spacing on the dipole stability.</div></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":"145 ","pages":"Article 104384"},"PeriodicalIF":2.3000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics Research Communications","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0093641325000175","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/3/4 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MECHANICS","Score":null,"Total":0}
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Abstract
The equilibrium positions of a dipole of edge dislocations embedded in a free-standing layer and symmetrically distributed with respect to the structure center has been theoretically investigated from a Peach–Koehler force analysis. A critical “size” ratio between the dislocation spacing and the layer thickness has been determined below which, in addition to the aligned stable configuration, two shifted dislocation configurations are present, one stable and one unstable. Beyond this critical ratio, only the unstable aligned configuration remains, demonstrating the combined effect of the spatial confinement and dislocation spacing on the dipole stability.
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Mechanics Research Communications publishes, as rapidly as possible, peer-reviewed manuscripts of high standards but restricted length. It aims to provide:
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