Affiliation of Author(s):能源与动力学院
Journal:航空动力学报
Key Words:C/C复合材料;三维四向编织;高温;氧化;拉伸;疲劳;
Abstract:为了研究三维编织C/C复合材料高温氧化环境下的力学性能,在大气环境下开展了有、无抗氧化涂层三维四向C/C复合材料平板试验件700℃时的拉伸试验和拉/拉疲劳试验。拉伸试验结果表明:无涂层三维四向C/C复合材料在700℃保温1h和2h后,强度分别下降至有涂层的70.33%和44.57%,弹性模量分别下降至有涂层的58.57%和38.99%,氧化后的总拉伸应变比有涂层的大幅度提升,材料破坏时无刚度突降现象。疲劳试验结果表明:有涂层三维四向C/C复合材料的剩余刚度先增加,而后保持,最后突降,应力水平为83%经10~5循环后剩余强度比初始强度提高了19.75%;无涂层三维四向C/C复合材料的剩余刚度先增加后降低,直至材料完全破坏,应力水平为75%经10~5循环后剩余强度比初始强度降低了20.40%。
Translation or Not:no
Date of Publication:2018-07-20
Co-author:,cht,zhj,XuYing
Correspondence Author:wwd
Professor
Gender:Male
Alma Mater:南京航空航天大学
Education Level:With Certificate of Graduation for Doctorate Study
Degree:Doctoral Degree in Engineering
School/Department:College of Energy and Power Engineering
Discipline:Aerospace Propulsion Theory and Engineering. Power Machinery and Engineering
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