| 力/热环境下复合材料薄壁结构的分离动力学分析 |
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| 引用本文： | 侯红宇,李彦斌,陈强,廖涛,费庆国. 力/热环境下复合材料薄壁结构的分离动力学分析[J]. 宇航学报, 2020, 41(11): 1385-1392. DOI: 10.3873/j.issn.1000-1328.2020.11.003 |
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| 作者姓名： | 侯红宇 李彦斌 陈强 廖涛 费庆国 |
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| 作者单位： | 1. 东南大学空天机械动力学研究所，南京 211189；2. 东南大学机械工程学院，南京 211189 |
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| 基金项目： | 国家自然科学基金(11802059, 11572086)；江苏省自然科学基金(BK20170022, BK20170656) |
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| 摘 要： | 基于显式动力学分析模拟了力/热环境下复合材料薄壁结构的分离过程,基于计及不确定性的Chang-Chang失效准则评估了复合材料结构的可靠性,进而探究了气动力载荷和温度载荷对结构分离动力学以及复合材料结构强度可靠性的影响规律。结果表明:气动力载荷及温度的升高均会加速结构的分离过程;高温会显著影响结构脱离时刻的转动角度,进而改变了结构的脱离姿态;系统可靠性随温度载荷的升高而降低。
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| 关 键 词： | 复合材料 气动力载荷 热环境 可靠性 Chang-Chang失效准则 |
| 收稿时间： | 2019-12-05 |
Separation Dynamic Analysis of Thin WalledComposite Structure under Thermal and Static Load |
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| HOU Hong yu,LI Yan bin,CHEN Qiang,LIAO Tao,FEI Qing guo. Separation Dynamic Analysis of Thin WalledComposite Structure under Thermal and Static Load[J]. Journal of Astronautics, 2020, 41(11): 1385-1392. DOI: 10.3873/j.issn.1000-1328.2020.11.003 |
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| Authors: | HOU Hong yu LI Yan bin CHEN Qiang LIAO Tao FEI Qing guo |
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| Affiliation: | 1. Institute of Aerospace Machinery and Dynamics,Southeast University, Nanjing 211189, China; 2.School of Mechanical Engineering, Southeast University, Nanjing 211189, China |
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| Abstract: | The separation dynamic analysis of thin walledcomposite structure under the aerodynamic load and thermal load is performed.The reliability of the composite structure is evaluated by using a Chang Chang failure criterion considering uncertainty. Further, theinfluence of the aerodynamic load and temperature load on the separationprocess and the strength reliability of the composite structure isinvestigated. Simulation results indicate that both the aerodynamic load andthe increasing temperature load will result in the acceleration of theseparation process. The temperature load has a significant influence on therotation angle at the moment of separation, which ultimately changes thedetached posture of the structure. The increase of temperature load could leadto the reduction of system reliability. |
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| Keywords: | Composite,Aerodynamic load,Thermal environment Reliability,Chang Chang failure criterion , |
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