引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1149次   下载 617 本文二维码信息
码上扫一扫!
分享到: 微信 更多
CFRP管件的弯曲蠕变行为试验研究
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
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
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)
Experimental Study on the Bending Creep Behavior of CFRP Tube
MA Yu1, WANG Hui2, SHAO Zhenwei3, YANG Zengqin1, SHANG Fulin1, HOU Demen1, GENG Hongbin4, LV Gang4
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
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