含初始几何缺陷的船用复合材料加筋板后屈曲的渐进失效分析

查看全文 作　　者：Fattaneh [1]Morshedsolouk;Madjid [2]Karimirad

机构地区：[1]Faculty of Mechanical Engineering,Babol NoshirvaniUniversity of Technology,47148–73113 Babol,Iran;[2]School of Natural and Built Environment,Queen’s UniversityBelfast(QUB),Belfast BT95AG,UK

出　　处：《Journal of Marine Science and Application》索引2021年第20卷第4期,共12页

摘　　要：This work explores the postbuckling behavior of a marine stifened composite plate in the presence of initial imperfections.The imperfection shapes are derived from buckling mode shapes and their combinations.Thereafter,these imperfection shapes are applied to the model,and nonlinear large defection fnite element and progressive failure analyses are performed in ANSYS 18.2 software.The Hashin failure criterion is employed to model the progressive failure in the stifened composite plate.The efect of the initial geometric imperfection on the stifened composite plate is investigated by considering various imperfection patterns and magnitudes.Results show that when the magnitude of the imperfection is 20 mm,the ultimate strength of the stifened composite plate decreases by 31%.Moreover,global imperfection shapes are found to be fundamental in determining the ultimate strength of stifened composite plates and their postbuckling. 关键词：Initial geometric imperfection Laminated composite plate Postbuckling behavior Nonlinear fnite element method Progressive damage method Hashin damage criteria

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含初始几何缺陷的船用复合材料加筋板后屈曲的渐进失效分析

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