纤维增强复合材料的热黏弹性能  

Thermal Viscoelastic Behavior of Fiber Reinforced Composite

作　　者：许家宝 周储伟[1] 周逃林 Xu Jiabao;Zhou Chuwei;Zhou Taolin(State Key laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学,机械结构力学及控制国家重点实验室,南京210016

出　　处：《工程塑料应用》2018年第12期110-114,共5页Engineering Plastics Application

基　　金：国家自然科学基金项目(11272147);南京航空航天大学研究生创新基地开放基金项目(016001)。

摘　　要：建立了纤维增强复合材料的热黏弹性力学模型。模型中环氧树脂基体相与温度相关的黏弹性采用三元件模型模拟,模型参数通过热机械动力学分析实验测定,基于黏弹性–弹性对应性原理,采用复刚度法建立了单向和层合复合材料不同温度条件下的储能模量和耗散模量预测模型,并制备了一种玻璃纤维增强复合材料进行了试验验证。研究发现单向复合材料0°方向的耗散模量及90°方向的储能模量在整个实验温度范围内与树脂基体的变化规律是一致的,层合板的耗散抗弯刚度随温度近似呈线性增加,而储能抗弯刚度则呈加速下降趋势。所建立的模型能反映出试验观测到的规律。The thermal viscoelastic behavior of fiber reinforced composites was established.Three elements model was used to simulate the viscoelasticity of epoxy resin matrix and temperature.Parameters of the three elements model were calibrated by thermal dynamic mechanical analysis experiment.Based upon viscoelastic-elastic correspondence principle,predictions of storage and loss moduli for unidirectional composite(UD)and flexural stiffness for composite laminate were modeled by using complex stiffness method.Glass fiber reinforced composites were made and dynamic viscoelastic experiments were conducted for validating the theoretical model suggested.Results showed that the variations of loss modulus for 0°UD and storage modulus for 90°UD versus temperature were consistent with the change of the resin matrix during the whole experimental temperature range.For composite laminate,loss flexural stiffness increased linearly with temperature increased,while storage flexural stiffness decreased in accelerated pattern in whole test temperature range.The established viscoelastic model could reflect the observed law of experiment.

关 键 词：纤维增强复合材料 热黏弹性行为 储能模量 损耗模量 复刚度 

分 类 号：TB332[一般工业技术—材料科学与工程]