应变速率和温度对单束BFRP力学性能的影响  

Effects of Strain Rate and Temperature on Mechanical Behavior of Single Yarn BFRP

作　　者：朱德举[1] 欧云福 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《建筑材料学报》2016年第3期491-495,538,共6页Journal of Building Materials

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB026200);湖南省科技计划重点项目(2014WK2026)

摘　　要：利用MTS万能试验机和Instron落锤冲击系统分别研究了单束玄武岩纤维增强复合材料(单束BFRP)在室温(25℃)下的准静态(应变速率为(1/600)s^(-1))力学性能及不同温度(-25,0,25,50,75,100℃)、应变速率(40,80,120,160s^(-1))下的力学性能.结果表明:单束BFRP的拉伸力学性能与应变速率、温度具有相关性.在室温下,随着应变速率的增加,单束BFRP的弹性模量、破坏强度、峰值应变、最大应变和韧性均有不同程度的增大;在相同的应变速率(40s^(-1))下,随着温度的升高,弹性模量、破坏应力和冲击韧性先增大后减小,峰值应变和最大应变先减小后增大.Single basalt fiber yarn reinforced composite（single yarn BFRP）samples were tested under quasi-static loading at a strain rate of（1/600）s（-1） and room temperature（25℃）using a MTS load frame and dynamic tensile loading at four different strain rates（40,80,120,160s（-1））and six different temperatures（-25,0,25,50,75,100℃）utilizing a drop-tower impact system.The experimental results show that mechanical properties of single yarn BFRP are sensitive to strain rate and temperature.The elastic modulus,tensile strength,ultimate strain,maximum strain and toughness of single yarn BFRP increase with increasing strain rate at the same temperature;when strain rate is constant,the elastic modulus,tensile strength and toughness firstly increase and then decrease with increasing temperature,while the ultimate strain and maximum strain show opposite trend.

关 键 词：玄武岩纤维增强复合材料(BFRP) 应变速率 温度 拉伸性能 

分 类 号：TU599[建筑科学—建筑技术科学]