南京工业大学学报（自然科学版）2018，Vol.40Issue(1)：8-16,9.DOI:10.3969/j.issn.1671-7627.2018.01.002
三维编织碳/碳复合材料高温力学及疲劳试验研究
Experimental investigation on fatigue of 3D braided C/C composites at high temperatures
摘要
Abstract
The braided longitudinal tensile test of anti-oxidation coating coated non-trimming and trimming 3D four directional carbon/carbon (C/C) composites were investigated.The strength,elastic modulus and stress-strain curves were obtained in atmospheric environment at room temperature,800 and 900 ℃. The fatigue life data and residual stiffness with cyclic loading were obtained from the braided longitudinal tensile/tensile fatigue test for two kinds of specimens when temperature raised to 800℃. The static tensile and fatigue specimen fractures were observed by scaning electron microscope ( SEM ) . Tensile failed mechanism and tensile/tensile fatigue failed mechanism were analyzed. Results showed that the tensile strength became higher with temperature increase,and the mechanical property of non-trimming specimens was much better than that of trimming ones. The residual stiffness of 3D four directional C/C composites first increased and then decreased. The main failed mode of specimen was fiber tensile, but bundles of fibers pulled out when temperature elevated.More pull-out fiber in fatigue failed than tensile failed at the same temperature,and the matrix was delaminated obviously under fatigue load.关键词
三维编织/碳/碳复合材料/高温/拉伸/疲劳Key words
3D braided/carbon/carbon composites/high temperature/tensile/fatigue分类
通用工业技术引用本文复制引用
陈波,温卫东,孙煦泽,崔海涛,张宏建..三维编织碳/碳复合材料高温力学及疲劳试验研究[J].南京工业大学学报（自然科学版）,2018,40(1):8-16,9.基金项目
江苏省普通高校研究生科研创新计划(KYLX 0238) （KYLX 0238）
中央高校基本科研基金(100256XQA15002) （100256XQA15002）
