摘要
在室温及70℃条件下对单向T700/3234复合材料进行了湿热老化试验,分别测试了经历不同吸湿时间后材料的吸湿率、层间剪切强度和弯曲强度,并且利用扫描电镜(SEM)对力学性能试样的断口形貌进行了分析。结果表明,吸湿温度越高,饱和吸湿率越高。T700/3234复合材料具有良好的耐湿热性能,其层间剪切强度、弯曲强度保持率分别为69.33%和76.06%。吸湿使界面出现一定程度的脱粘是导致其力学性能下降的主要原因。
The moisture absorption rate, interlaminar shear strength and bending strength of unidirectional T700/3234 composites with different aging time through hydrothermal aging tests under room temperature and 70℃ are tested, and the fractographs of the samples are analyzed with SEM. The results indicate that the saturation moisture absorption rate increases with the improving temperature. The T700/3234 composites show good moisture resistance, and the retention of interlaminar shear strength and bending strength are 69.33% and 76.06%, respectively. Fibermatrix de-bonding caused by moisture absorption is the main reason of the decrease in the mechanical properties.
出处
《航空制造技术》
北大核心
2013年第4期65-68,共4页
Aeronautical Manufacturing Technology
基金
国家自然科学基金资助项目(50603014
51073094)
航空科学基金项目(2011ZF54019)
辽宁省高等学校杰出青年学者成长计划项目(LJQ2011013)
辽宁省"百千万人才工程"项目(2012921043)资助
关键词
碳
环氧复合材料
热老化
吸湿率
力学性能
Carbon/epoxy composites Hydrothermal aging Moisture absorption rate Mechanical properties