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| CFRP管件的弯曲蠕变行为试验研究 |
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马瑜1, 王辉2, 邵振威3, 杨增钦1, 尚福林1, 侯德门1, 耿洪滨4, 吕刚4
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1.西安交通大学 航天航空学院, 西安 710049;2.西安空间无线电技术研究所, 西安 710100;3.中国航发黎阳航空发动机集团有限公司, 贵阳 561102;4.哈尔滨工业大学 材料科学与工程学院, 哈尔滨 150001
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| 摘要: |
| 为评价航天器结构中碳纤维增强树脂基（CFRP）复合材料管件的使用可靠性，开展了三点弯曲加载条件下CFRP管件弯曲性能和蠕变行为试验研究。进行了管件弯曲模量和弯曲强度测试、500 h时长的恒温蠕变测试以及-60 ℃～100 ℃和-160 ℃～80 ℃两种高低温循环蠕变测试，获得了典型温度工况、不同应力水平作用下管件弯曲蠕变变形规律。根据测试结果，确定了基于时间-温度-应力等效原理的管件蠕变主曲线以及唯象蠕变Findley模型，预测分析了管件长期蠕变变形；采用最大应变强度准则，对该CFRP管件的强度特性和安全承载能力进行了评价。结果表明，该CFRP管件在设计服役期限内能够满足蠕变变形与强度要求。 |
| 关键词: CFRP管件 弯曲强度 蠕变特性 时间-温度-应力等效原理 承载能力评定 |
| DOI：10.15982/j.issn.2095-7777.2017.04.006 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（11272243，11672220）；NSAF联合基金资助项目（U1330116） |
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| Experimental Study on the Bending Creep Behavior of CFRP Tube |
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MA Yu1, WANG Hui2, SHAO Zhenwei3, YANG Zengqin1, SHANG Fulin1, HOU Demen1, GENG Hongbin4, LV Gang4
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1.School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, China;2.Xi'an Institute of Space Radio Technology, Xi'an 710100, China;3.Guizhou Liyang Aero-Engine Corporation, Guiyang 561102, China;4.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
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| Abstract: |
| To evaluate the service reliability of Carbon Fiber Reinforced Plastic (CFRP) composite tubes used in spacecraft structure,static three-point-bending and creep tests of the CFRP tube are performed. At first,experimental tests of bending modulus and bending rupture strength,500-hour-long constant temperature creep,-60 ℃～100 ℃ and -160 ℃～80 ℃ thermal cyclic creep are conducted for the tube respectively. Based on the testing results,long-term creep deformation of the tube is predicted,using the time-temperature-stress superposition principle,the derived creep master curves as well as a phenomenal Findley model. Then,assessment on the mechanical strength and load-carrying capacity of the CFRP tube is made according to a maximum strain criterion. Results show that the CFRP tube can meet the creep deformation and strength requirements under the long-term service lifetime. |
| Key words: CFRP tube bending strength creep property time-temperature-stress superposition principle load-carrying capacity assessment |