混杂B/CFRP层合板拉伸性能及疲劳寿命仿真  

Tensile properties and fatigue life simulation of hybrid B/CFRP laminates

作　　者：朱发旺 朱青[1] 杨才千[1] Zhu Fawang;Zhu Qing;Yang Caiqian(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京211189

出　　处：《东南大学学报（自然科学版）》2024年第3期668-674,共7页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(52078122)。

摘　　要：为探究混杂玄武岩纤维/碳纤维增强复合材料(B/CFRP)层合板的力学响应和疲劳寿命,采用湿铺层法制作混杂层合板,通过单向拉伸试验方法研究了B/CFRP层合板在不同铺层数量和不同长度下的基本拉伸性能.借助ABAQUS精细化有限元模型,对混杂层合板拉伸过程中响应特征进行模拟研究.结合疲劳理论,分析了B/CFRP层合板的应力-寿命曲线,并基于静载仿真结果,预测了B/CFRP层合板在不同应力幅、应力比下的疲劳寿命.试验结果表明,试件长度对层合板力学性能影响不显著,随着BFRP层数的增加,层合板逐渐出现多级断裂现象.有限元仿真值与试验值较为吻合,B/CFRP层合板疲劳极限强度为0.568倍极限强度.相同应力比情况下,应力上限越大,疲劳寿命越短,且变化幅度较为明显.当应力上限低于0.7倍极限强度时,仿真寿命与理论寿命相差较小.To investigate the mechanical response and fatigue life of hybrid basalt/carbon fiber reinforced polymer(B/CFRP)laminates,the hybrid laminates were fabricated by the wet lay-up method,and the basic tensile properties of B/CFRP laminates were investigated by uniaxial tensile tests with different lay-up quantities and lengths.Using the ABAQUS refined finite element model,the response characteristics of hybrid laminates during the tensile process were simulated.Combined with the fatigue theory,the stress-life curve of B/CFRP was analyzed.Based on the static load simulation results,the fatigue lives of B/CFRP under different stress amplitudes and stress ratios were predicted.The experimental results show that the specimen length has little effect on the mechanical properties of the laminate.The multi-stage fracture phenomenon gradually appears with the increase of the number of the BFRP layers.The finite element simulation values are in good agreement with the test values,and the fatigue ultimate strength of B/CFRP is 0.568 times the ultimate strength.With the same stress ratio,the higher the upper stress strength,the shorter the fatigue life and the more obvious the change.When the upper limit of stress is lower than 0.7 times the ultimate strength,the difference between the simulation life and the theoretical life is minor.

关 键 词：纤维增强复合材料 拉伸性能 有限元仿真 多级断裂 疲劳寿命预测 

分 类 号：TU599[建筑科学—建筑技术科学]