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| Buckling reliability analysis of liner with initial defects on composite overwrapped pressure vessel based on response surface method |
| Received:April 24, 2022 Revised:June 08, 2022 |
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| DOI：10.7511/jslx20220424002 |
| KeyWord:pressure vessel metal liner depression reliability |
| Author | Institution |
| 张国 |
大连理工大学 工程力学系, 大连 |
| 刘宇琛 |
大连理工大学 工程力学系, 大连 |
| 张笑闻 |
大连理工大学 材料科学与工程学院, 大连 |
| 薛姝楠 |
大连理工大学 工程力学系, 大连 |
| 任明法 |
大连理工大学 工程力学系, 大连 ;大连理工大学 工业装备结构分析国家重点实验室, 大连 |
| 李刚 |
大连理工大学 工程力学系, 大连 ;大连理工大学 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| The initial defects of the liner will cause serious harm to the service performance of the composite overwrapped pressure vessel (COPV).In this paper,a reliability analysis method for buckling of liner with initial defects of a COPV is proposed based on response surface method.The three-dimensional finite element model of a T700 carbon fiber/epoxy resin COPV with an aluminum alloy 6061 liner is established,and realize the shrinkage buckling analysis of the liner of COPV is realized.Based on the response surface method,the limit state equation of the COPV is constructed.Assuming that the random variables in the structure obey Gaussian distribution,the reliability analysis of the COPV considering the changes of geometric size and depression size is carried out.The results show that:during the processing,the dispersion of the thickness of the cylinder will seriously affect the reliability of the COPV;the radius of the cylinder,the length of the cylinder,the radius of the dome and the thickness of the dome have little influence on the reliability of the pressure vessel within the general processing error.For the type of COPV in this paper,when the depression radius exceeds 10mm and the depression depth exceeds 2mm,the reliability of the pressure vessel will be significantly reduced. |
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