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Journal of Marine Science and Application 2021年第4期20卷 694-705页

作者： Fattaneh Morshedsolouk Madjid Karimirad Faculty of Mechanical Engineering Babol Noshirvani University of Technology School of Natural and Built Environment Queen's University Belfast (QUB)

This work explores the postbuckling behavior of a marine stiffened composite plate in the presence of initial *** imperfection shapes are derived from buckling mode shapes and their combinations. Thereafter, these imperfection shapes are applied to the model, and nonlinear large deflection finite 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 stiffened composite plate. The effect of the initial geometric imperfection on the stiffened 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 stiffened composite plate decreases by 31%. Moreover, global imperfection shapes are found to be fundamental in determining the ultimate strength of stiffened composite plates and their postbuckling.

关键词： Initial geometric imperfection Laminated composite plate Postbuckling behavior Nonlinear finite 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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Journal of Marine Science and Application 2021年第4期20卷 694-705页

作者： Fattaneh Morshedsolouk Madjid Karimirad Faculty of Mechanical Engineering Babol NoshirvaniUniversity of Technology47148–73113 BabolIran School of Natural and Built Environment Queen’s UniversityBelfast(QUB)Belfast BT95AGUK

This work explores the postbuckling behavior of a marine stifened composite plate in the presence of initial *** imperfection shapes are derived from buckling mode shapes and their ***,these imperfection shapes are applied to the model,and nonlinear large defection fnite element and progressive failure analyses are performed in ANSYS 18.2 *** hashin failure criterion is employed to model the progressive failure in the stifened composite *** efect of the initial geometric imperfection on the stifened composite plate is investigated by considering various imperfection patterns and *** 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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