Elastic response analysis of cylindrical vessels subjected to internal explosion

• Published in: The International journal of pressure vessels and piping Vol. 202; p. 104880
• Main Authors: Jun-hua, Hu, Yong-jun, Deng, Qi, Dong, Yong, Yao, Yi-fei, Ren
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2023
• Subjects: Buckling phenomenon; Cylindrical vessel; Elastic response; Explosive loading; Strain growth; Cylindrical vessel; Explosive loading; Elastic response; Buckling phenomenon; Strain growth
• ISSN: 0308-0161; 1879-3541
• DOI: 10.1016/j.ijpvp.2022.104880

Strain growth and buckling are typical phenomena of pressure vessels under internal explosion load. To study the mechanism of the strain growth and buckling phenomena, the numerical simulations are performed by LS-DYNA to study the elastic response of the cylindrical vessels under internal explosion. The results show that for the cylindrical vessel with a free boundary, the response of the vessel is a breathing-like mode under the small explosive loading. When the explosive loading becomes larger, the response of the vessel is a breathing-like mode in the early stage and a coupling of breathing-like mode and buckling response in the late stage. The phenomenon of buckling is caused by large bending deformation. According to the response characteristics of the vessel at different stages, an improvement to the traditional idea of strain growth phenomenon was proposed, and the strain growth phenomenon is split into two stages: the first stage is defined as the strain fluctuation stage of the vessel in the breathing-like mode; the second stage is defined as the strain growth stage of the vessel evolving from the breathing-like mode to the buckling mode. The results show that the buckling phenomenon will increase the displacement of the container, but it does not necessarily lead to strain growth phenomenon and sometimes it may even weak the strain. There is an edge effect is found during the study, which must have to lead an increase in the degree of the response of the vessel. •According to the response form of the cylindrical container in the actual working environment, the traditional analysis method of strain growth factor is divided into two stages.•The response enhancement phenomenon will appear in the edge section of the cylindrical container, which is defined as the edge effect.•The causes of the buckling phenomenon are analyzed, and the effect on the cylindrical vessel response is summarized.