碳纤维含量对碳纤维增强聚醚醚酮复合材料弯曲性能和失效行为的影响  

Effect of Carbon Fiber Contents on Bending Properties and Failure Behavior of CFRP Composite Materials

作　　者：何理[1] 邹春龙[1] 文周 王红霞[1] HE Li;ZOU Chunlong;WEN Zhou;WANG Hongxia(College of Mechanical Engineering,Hubei University of Automotive Technology,Shiyan 442002,China;College of Mechanical Engineering,Xi an University of Science and Technology,Xi an 710054,China)

机构地区：[1]湖北汽车工业学院机械工程学院,湖北十堰442002 [2]西安科技大学机械工程学院,陕西西安710054

出　　处：《塑料工业》2024年第2期120-127,共8页China Plastics Industry

基　　金：国家自然科学基金(51475150);湖北省高等学校优秀中青年科技创新团队计划项目(T2022027);湖北省教育厅科学技术研究计划项目(B2021145,Q20191801)。

摘　　要：基于渐进损伤的VUMAT子程序,并引入了Johnson-Cook模型,通过Matlab生成了不同碳纤维占比的碳纤维增强聚醚醚酮(CFRP)复合材料,建立了三点弯曲有限元模型。通过分析应力—应变分布、载荷—位移曲线和吸收能—位移曲线得出以下结论:添加碳纤维有效改善了基体聚醚醚酮(PEEK)内部的应力—应变分布,显著提升了材料的力学性能、刚度和抗断裂性能。CFRP复合材料在三点弯曲过程中表现出更好的性能,能够承受明显的塑性变形,且有效避免裂纹扩展。此外,在相同位移载荷条件下,随着碳纤维含量增加,CFRP复合材料的位移逐渐减小。特别是在碳纤维质量分数为10%和20%的复合材料中,上表面和下表面的最大位移呈现出曲折的特点。结合应力—应变场的分布情况,这表明碳纤维的添加能有效提高材料的刚度和抗弯性能。The VUMAT subroutine based on progressive damage was used to introduce the Johnson-Cook model,and generate different carbon fibre reinforced polyetherether ketone(CFRP)composites through Matlab.A three-point bending finite element model was established.By analyzing the stress-strain distribution,load-displacement curve,and absorbed energy-displacement curve,it is found that adding carbon fiber effectively improves the stress-strain distribution inside the matrix polyetheretherketone(PEEK)and improves the mechanical properties,the stiffness and fracture resistance of the material.CFRP composite materials perform better during three-point bending,withstand significant plastic deformation,and effectively avoid crack expansion.In addition,under the same displacement load condition,CFRP composite materials displacement gradually decreases as the carbon fiber contents increase.Especially in composites with carbon fiber mass fractions of 10%and 20%carbon fiber contents,the maximum displacements of the upper and lower surfaces show tortuous characteristics.Combined with the distribution of stress and strain fields,this shows that adding carbon fiber can effectively improve the stiffness and bending resistance of the material.

关 键 词：碳纤维增强聚醚醚酮 三点弯曲 VUMAT子程序 Johnson-Cook模型 弯曲性能 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业]