苎麻/玻璃纤维混杂复合材料的老化研究及寿命预测  

AGING STUDY AND LIFE PREDICTION OF RAMIE/GLASS FIBER HYBRID COMPOSITES

作　　者：朱坤坤[1] 倪爱清[1] 王继辉[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《玻璃钢／复合材料》2016年第5期48-54,共7页Fiber Reinforced Plastics/Composites

摘　　要：采用玻璃纤维布与苎麻纤维布混杂增强乙烯基树脂制备复合材料,结合船舶在服役环境下的实际情况,通过人工加速老化的方法,对苎麻纤维/玻璃纤维混杂复合材料进行水浸泡老化、盐雾老化和紫外老化实验,研究混杂复合材料的拉伸强度及弯曲强度等随老化时间、老化温度等的变化情况及性能退化趋势,并根据剩余强度模型对混杂复合材料进行寿命预测。研究表明,老化初期阶段试样吸湿趋势主要以浓度梯度推动的菲克扩散为主。老化环境不同,试样强度的衰减程度不同,水浸泡老化对试样影响最大,盐雾老化次之,紫外老化影响相对较少。根据剩余强度模型预测10年后盐雾试样弯曲强度保留率为78.0%,紫外老化弯曲试样强度保留率为81.89%。Hybrid fibers consisting of glass fiber and ramie fiber reinforced composites were fabricated. Combined with the actual situation of ship in service,three different accelerated aging,including water,salt fog and ultraviolet,of the hybrid composite materials were tested. The changes of the tensile strength and bending strength of the composites under different aging time and different aging temperature and the trend of performance degradation were investigated. Residual strength model was used to predict the residual strength of composite materials. It shows that the moisture absorption trend of the sample is mainly driven by the concentration gradient of FICK diffusion at the initial phase. The degree of the the material strength degradation changes with different aging environments. The results shows that,the damage of water is greater than salt-fog which is greater than ultraviolet. According to the residual strength model,after 10 years of aging,residual strength of specimens in salt fog environment can maintain78%,and the residual strength of specimen in ultraviolet environment can maintain 81. 89%.

关 键 词：玻璃纤维 混杂复合材料 老化研究 力学性能 寿命预测 

分 类 号：TB332[一般工业技术—材料科学与工程]