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| The effect of temperature cycling load on interfacial damage of flexible joint |
| Received:July 01, 2020 Revised:September 18, 2020 |
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| DOI：10.7511/jslx20200701004 |
| KeyWord:solid rocket motor flexible joint interfacial degradation temperature cycling load interfacial damage |
| Author | Institution |
| 王才 |
西安航天动力技术研究所, 燃烧、热结构和内流场重点实验室, 西安 |
| 史宏斌 |
西安航天动力技术研究所, 燃烧、热结构和内流场重点实验室, 西安 |
| 刘沛 |
西安航天动力技术研究所, 燃烧、热结构和内流场重点实验室, 西安 |
| 屈转利 |
西安航天动力技术研究所, 燃烧、热结构和内流场重点实验室, 西安 |
| 刘统斌 |
西安航天动力技术研究所, 燃烧、热结构和内流场重点实验室, 西安 |
| 刘芹 |
西安航天动力技术研究所, 燃烧、热结构和内流场重点实验室, 西安 |
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| Abstract: |
| A solid rocket motor receives the effect of environmental humidity,heat and ageing load during production,transportation and storage,which lead to degradation of the interface mechanical properties of its flexible joints.In order to study the influence law of interfacial degradation of the flexible joints on interfacial damage,one mathematical model describing interfacial degradation is established base on bilinear cohesive zone model.For ease of research,temperature cycling load instead of environmental ageing load is chosen as the external load in interfacial damage analysis,and the simulation is carried out with ABAQUS 6.14.Results indicate that the interface bonded to rear after flange has maximum damage.The interfacial damage of interface13 and interface14 has increased from 2.9% and 4.3% in the initial state to 5.2% and 8.2% respectively when the temperature cycle period reaches 672, an increase by up to 81.2% and 91.7%.Meanwhile,the temperature cycling load can accelerate the interfacial damage of the flexible joints.This degradation model of interface mechanical properties can provide a reference for the study of environmental ageing of flexible joints. |
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