{"title":"A reliable methodology for the preliminary design of multidirectional composite open-hole plates using the coupled criterion","authors":"","doi":"10.1016/j.compstruct.2024.118400","DOIUrl":null,"url":null,"abstract":"<div><p>In the aerospace industry, composite structures are preferred for their high strength-to-mass ratio and fatigue strength. However, using advanced non-linear Finite Element models for the strength prediction of composite laminates during preliminary design and optimisation can lead to long computing times. Thus, linear elastic fracture mechanics is suitable for preliminary design. In this work, the coupled energy–stress criterion has been successfully applied to predict translaminar failure of open-hole tensile and compression specimens, considering three different stacking sequences with varying degrees of orthotropy. This criterion uses stress and energy criteria as necessary conditions for fracture, since neither of them is sufficient alone. The approach involves a characteristic length dependent on the composite’s properties and geometry. The characteristic length is used to satisfy both criteria simultaneously, avoiding the need for correction factors. The current approach includes the material anisotropy in both elastic and fracture parameters. The onsets of symmetric and antisymmetric crack patterns are investigated, considering where failure is predicted from the ply properties.</p></div>","PeriodicalId":281,"journal":{"name":"Composite Structures","volume":null,"pages":null},"PeriodicalIF":6.3000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composite Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263822324005282","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}
引用次数: 0
Abstract
In the aerospace industry, composite structures are preferred for their high strength-to-mass ratio and fatigue strength. However, using advanced non-linear Finite Element models for the strength prediction of composite laminates during preliminary design and optimisation can lead to long computing times. Thus, linear elastic fracture mechanics is suitable for preliminary design. In this work, the coupled energy–stress criterion has been successfully applied to predict translaminar failure of open-hole tensile and compression specimens, considering three different stacking sequences with varying degrees of orthotropy. This criterion uses stress and energy criteria as necessary conditions for fracture, since neither of them is sufficient alone. The approach involves a characteristic length dependent on the composite’s properties and geometry. The characteristic length is used to satisfy both criteria simultaneously, avoiding the need for correction factors. The current approach includes the material anisotropy in both elastic and fracture parameters. The onsets of symmetric and antisymmetric crack patterns are investigated, considering where failure is predicted from the ply properties.
期刊介绍:
The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials.
The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.