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Failure mode analysis of composite cylindrical shell structure under underwater explosion

Authors :
Kun YANG
Wei ZHANG
Ying LI
Xianxian HE
Source :
Zhongguo Jianchuan Yanjiu, Vol 18, Iss 2, Pp 55-63 (2023)
Publication Year :
2023
Publisher :
Editorial Office of Chinese Journal of Ship Research, 2023.

Abstract

ObjectiveIn order to improve the explosion and impact resistance of the protective structures of unmanned underwater vehicles (UUVs), autonomous underwater vehicles (AUVs), air bottles, etc., the structural response and failure modes of carbon fiber reinforced plastic (CFRP) cylindrical shells under underwater explosion and high hydrostatic pressure are investigated. MethodA computational model of CFRP cylindrical shell implosion under the combined action of hydrostatic pressure and impact load is established using ABAQUS software and the coupled Euler-Lagrange (CEL) method. The effectiveness of the numerical simulation method is then verified by comparison with the experimental results. On this basis, the failure modes and parametric effects of CFRP cylindrical shell implosion are obtained. ResultsThe underwater implosion of composite cylindrical shells can be divided into three stages: buckling, wall contact and failure propagation. Reducing the length-to-diameter ratio of the CFRP cylindrical shell can improve the impact resistance ability and affect the failure mode of the structure. With the increase in the number of fiber layers, the static water bearing capacity and impact resistance ability of the shell structure increase. With the increase in the impact block velocity, the wall boundary contact and failure propagation of the cylindrical shell become more obvious, matrix fractures occur more frequently and the cracks show an obviously increasing trend in the lengthwise direction of the cylindrical shell. ConclusionThe results of this study can provide data guidance for the structural design of underwater vehicles and promote the application of composite materials in the field.

Details

Language :
English, Chinese
ISSN :
16733185
Volume :
18
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Zhongguo Jianchuan Yanjiu
Publication Type :
Academic Journal
Accession number :
edsdoj.2e033cc11d4434381e779e1d50dc94a
Document Type :
article
Full Text :
https://doi.org/10.19693/j.issn.1673-3185.02835