碳纤维-玻璃纤维混杂增强环氧树脂复合材料低速冲击性能及其模拟  

Low-velocity impact behavior and numerical simulation of carbon fiber-glass fiber hybrid reinforced epoxy composites

作　　者：张辰 饶云飞 李倩倩[1,2] 李炜 ZHANG Chen;RAO Yunfei;LI Qianqian;LI Wei(Shanghai Collaborative Innovation Center for High Performance Fiber Composites,Donghua University,Shanghai 201620,China;College of Textiles,Donghua University,Shanghai 201620,China;Engineering Research Center of Technical Textiles of Ministry of Education,Shanghai 201620,China)

机构地区：[1]东华大学上海高性能纤维复合材料协同创新中心,上海201620 [2]东华大学纺织学院,上海201620 [3]产业用纺织品教育部工程研究中心,上海201620

出　　处：《复合材料学报》2021年第1期165-176,共12页Acta Materiae Compositae Sinica

摘　　要：本文基于实验和数值模拟方法研究了碳纤维-玻璃纤维混杂增强环氧树脂复合材料低速冲击性能。采用商业有限元软件ABAQUS建立了层间/层内两类混杂复合材料低速冲击模型,采用基于应变形式的Hashin失效准则模拟面内损伤;零厚度Cohesive内聚力单元预测层间分层;编写VUMAT子程序定义渐进失效过程,并结合C扫和Micro-CT扫描,分析了复合材料内部微观损伤形貌及损伤分布情况。结果表明,层间混杂结构复合材料的抗冲击性能更优,其中铺层形式为I-C的混杂复合材料抗冲击性能最佳,冲击面为玻璃纤维时混杂结构复合材料对冲击响应区别不明显,CN-1层内混杂结构复合材料抗冲击性能优于CN-2层内混杂结构复合材料。低速冲击损伤主要为冲击处纤维断裂、基体破坏及界面分层,混杂结构可有效降低冲击破坏,层间混杂结构中玻璃纤维层损伤较大,层内混杂结构损伤受混杂界面影响,碳纤维束对临近的玻璃纤维束具有保护作用。The low velocity impact behavior of carbon fiber-glass fiber hybrid composites were investigated based on experimental and numerical simulation.Two finite element models of interlayer and intralayer hybrid composites under low velocity impact were established in ABAQUS software.The strain-based Hashin failure criteria was adopted to predict the intralaminar damage and zero thickness Cohesive elements were used to simulate the delamination.The progress damage process were carried out by user-defined subroutine VUMAT.Internal microscopic damage state and damage distribution condition were obtained by means of C-scan and Micro-CT technique.The results show that the interlayer hybrid structure composites provide better impact-resistant properties,while the I-C hybrid structure composites present the best impact behavior.The difference of impact response of hybrid structure composites is not obvious when the impact-side face is glass fiber.The impact property of CN-1 intralayer hybrid structure composites is better than that in CN-2 intralayer hybrid structure composites.The damage induced by low velocity impact includes the fiber broken near impact point,matrix damage and delamination.Hybrid structure can reduce impact damage effectively.The glass fiber layers in interlayer hybrid structure experienced severe damage and the hybrid interface have influence on the damage of intralayer laminates.The carbon fiber bundles provide protection effect on neighbor glass fiber bundle.

关 键 词：混杂复合材料 低速冲击 无损检测 有限元分析 渐进损伤 

分 类 号：TB332[一般工业技术—材料科学与工程]