摘要
受环境因素作用,碳纤维增强聚合物基复合材料(Carbon fiber reinforced polymer composities,CFRP)湿热环境下发生性能退化是一个重要的工程问题,而如何通过实验室加速试验再现自然环境对复合材料的老化作用成为解决此问题的关键。基于时间-温度-湿度等效原理,将湿热环境下CFRP粘弹性能的改变作为材料的老化损伤度量,建立不同湿热环境之间当量折算关系,提出加速老化当量折算系数的确定方法。以典型军机结构用CFRP为例,实例计算了材料不同温度、湿度环境下的当量折算系数,根据地面停放环境谱当量折算得到加速试验谱,加速效果令人满意。最后,对比分析了温度与湿度对当量折算系数的影响,结果表明,温度变化对当量折算系数的影响要比湿度变化的影响显著。
Affected by environment elements, the degeneration of mechanical property for carbon fiber reinforced polymer （CFRP） composites under hygrothermal environments is an important engineering problem, and the key segment on solving this problem is how to reappear the aging effect of natural environment on CFRP by taking accelerated aging experiments under laboratory condition. Based on timetemperature-humidity superposition principle （TTHSP）, the change of viscoelasticity for CFRP is considered as damage measure for Hygrothermal aging. The equivalent conversion relationship between different Hygrothermal environments is determined, and the calculating method of equivalent conversion coefficient is provided. Taking a typical CFRP used in warcraft structure for example , equivalent conversion coefficients under different hygrothermal environments are calculated, the accelerated aging environment spectrum are programmed according to the conversion of ground parking environment spectrum, and the accelerating result is acceptable . Finally, the influences of temperature and humidity on equivalent conversion coefficient are checked, and the result shows that the influence of temperature change on equivalent conversion coefficient is more remarkable than that of humidity change.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2014年第3期382-388,共7页
Journal of Nanjing University of Aeronautics & Astronautics
基金
航空科学基金(2008ZH85001)资助项目
关键词
碳纤维复合材料
时间-温度-湿度等效原理
湿热老化
加速关系
carbon fiber/polymer composites
timetemperature-humidity superposition principle （TTHSP）
hygrothermal aging
accelerating relationship
作者简介
通信作者：陈跃良，男，教授，博士生导师，E-mail：cyi0532@sina．com。
