An equivalent imperfection-based FE simulation of the stability of dented cylindrical shells accounting for unintended imperfections

Musa, Abubakr E. S.; Al-Shugaa, Madyan A.; Al-Gahtani, Husain J.

doi:10.1016/j.tws.2020.107159

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…Batikha et al, Morteza Vakili, and Hossein Showkati have presented a new method to strengthen cylindrical shells and that the use of FRP could increase buckling strength [29,30]. Many experimental and numerical works have been conducted in cylindrical shells, including the dent parameters within a decade [3,5,[31][32][33][34][35].…”

Section: Eccsmentioning

confidence: 99%

A numerical perspective for CFRP‐wrapped thin‐walled steel cylinders

et al. 2023

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The failure of steel cylindrical shells with carbon fiber‐reinforced polymers (CFRP) under hydrostatic pressure is studied in this article by experimental tests and the finite element method. Simulations were performed for 12 cylindrical shells with different dent numbers, dent depths, and two perfect models with and without CFRP. The finite element models are built to simulate the buckling behavior. The nonlinear stabilization method is preferred to simulate the buckling behavior. The finite element results agree well with the corresponding experimental tests and theories. A parametric study is conducted, and the number, depth, width of dents, and the effects of CFRPs on the critical buckling pressure are discussed. The dents are placed symmetrically around the cylinder with a thickness of tc (thickness of cylinder) and 2tc mm. The initial and overall buckling load decreased with increasing amplitude for dent numbers with different dent depths on all models. The results show that the number and depth of dents generally have a negative effect on the buckling strength, while CFRPs increase the critical buckling strength and are effective in repair as a retrofitting concept.

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Section: Eccsmentioning

confidence: 99%

A numerical perspective for CFRP‐wrapped thin‐walled steel cylinders

et al. 2023

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“…В то же время, если нагружение остановить раньше, чем будет достигнута предельная нагрузка, состояние системы при отсутствии ползучести будет устойчивым, ибо она при дальнейшем увеличении времени будет пребывать в малой окрестности своего невозмущенного состояния. Учет начальных несовершенств мог бы привести к получению более достоверных расчетных оценок границы области устойчивости, определяющей смену форм состояний [10][11][12][13].…”

Section: Introductionunclassified

Experimental study of elastic-plastic deformation of a cylindrical shell made of steel 45

Черемных

2021

Struct. Mech. of Eng. Const. and Build

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Relevance. The use of shells as thin-walled structures for various industries is very diverse. Spherical shells are widely used in the aircraft industry, circular cylindrical shells are used in the oil and gas industry, and more than 30 analytical forms of shells have been used in the construction industry. All elements of shell structures are undoubtedly subject to various strength calculations. Also, a separate role in the study is occupied by the experimental part, which confirms or refutes the calculated equations, this indicates the undoubted perspective and relevance of modeling the loading of shell structures. The aim of the study is to assess the condition of a thin-walled shell under three-parameter loading by tensile, compression and torsion forces. Methods. Experimental studies on the deformation of shells carried out in laboratory conditions on prototypes made of steel 45 GOST 1050-2013 are presented, and the loading conditions of the sample are modeled, similar to the possible conditions for applying loads to existing structures. Results. Experimental diagrams of deformation of the sample material in various planes are given, the development of deformation of the shell after applying joint efforts of stretching and torsion, as well as compression and torsion to the destruction of the material is estimated. For the relevance of the conducted experiment, a real design has been selected, which, when certain conditions are created, can experience appropriate experimental loads.

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