文献类型：期刊文献

英文题名：Stress intensity factor of semi-elliptical surface crack in a cylinder with hoop wrapped composite layer

作者：Chen, Jianjun[1];Pan, Hongliang[1]

机构：[1]E China Univ Sci & Technol, Mech & Power Engn Dept, Shanghai 200237, Peoples R China

年份：2013

卷号：110

起止页码：77

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：20133916773762);WOS:【SCI-EXPANDED(收录号:WOS:000325595100014)】；

基金：The authors are grateful to the financial support by Natural Science Foundation of China (51105143), the Fundamental Research Funds for the Central Universities (1114036) and Shanghai University Young Teachers Training Funds (YG0142129).

语种：英文

外文关键词：Stress intensity factor; Cylinder; Axial crack; Finite element methods; Hoop wrapped composite

摘要：In this paper the fracture behavior of the compressed natural gas (CNG) cylinder with hoop wrapped composite layer is investigated for the axial crack at the inner surface. By the aid of the three-dimensional finite element method, the stress intensity factors along the crack front are obtained for different crack profiles. The effects of the cylinder geometry, hoop wrapped layer thickness and the property distributions of the composite layer on the stress intensity factor are discussed in detail. The numerical results show that the hoop wrapped composite cylinder can lower the stress intensity factor value greatly and ensure the safe use of pressure vessels containing defects in service. The composite property distribution owns a distinct effect on the crack behavior in different directions that provides a clear guide to the maintenance of CNG cylinder. Finally an approximate formula with high precision is proposed to evaluate the stress intensity factor along the axial crack front in the hoop wrapped cylinder with composite layer. (C) 2013 Elsevier Ltd. All rights reserved.