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哈尔滨工程大学学报（英文版） 2024年第2期23卷 460-469页

作者： Musa Bahmani fattaneh morshedsolouk Mohammad Reza Khedmati Babol Noshirvani University of Technology Mechanical Engineering FacultyBabolIran Amirkabir University of Technology Department of Maritime EngineeringTehranIran

This paper numerically evaluates the effect of the crack position on the ultimate strength of stiffened *** such as notches and cracks in aged marine stiffened panels can reduce their ultimate *** investigate the effect of crack length and position,a series of nonlinear finite element analyses were carried out and two cases were considered,i.e.,case 1 with thin stiffeners and case 2 with thick *** both cases,the stiffeners have the same cross-section *** have a basis for comparison,the intact panels were modeled as *** cracks and notches were in the longitudinal and transverse direction and were assumed to be in the middle part of the *** cracks and notches were assumed to be through the thickness and there is neither crack propagation nor contact between crack *** on the numerical results,longitudinal cracks affect the behavior of the stiffened panels in the postbuckling *** the stiffeners are thinner,they buckle first and provide no reserved strength after plate ***,cracks in the stiffeners do not affect the ultimate strength in the case of the thinner ***,when stiffeners are thicker,they affect the postbuckling behavior *** that case,cracks in the stiffeners affect the buckling and failure modes of the stiffened *** effect of notch was also *** contrast to the longitudinal crack in stiffeners,a notch in the stiffeners reduces the ultimate strength of the stiffened panel for both slender and thick stiffeners.

关键词： Stiffened panels Crack Notch Ultimate strength Buckling Nonlinear finite element method

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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（英文）

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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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