短纤维增强橡胶密封复合材料界面疲劳损伤行为  

Interfacial Fatigue Damage Behavior of Short Fiber Reinforced Rubber Sealing Composites

作　　者：宇晓明 张斌[1] 顾伯勤[2] Xiaoming Yu;Bin Zhang;Boqin Gu(School of Mechanical Engineering,Changshu Institute of Technology,Changshu 215500,China;School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]常熟理工学院机械工程学院,江苏苏州215500 [2]南京工业大学机械与动力工程学院,江苏南京211816

出　　处：《高分子材料科学与工程》2021年第2期108-115,共8页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51705037);江苏省高等学校自然科学研究项目(17KJB130001,19KJB130002);第十六批“六大人才高峰”高层次人才项目(GDZB-063);新引进教师科研启动基金(XZ1633)。

摘　　要：依据广义自洽方法,建立了包含芳纶纤维、界面相、橡胶基体和等效介质的代表性体积单元(RVE)模型。采用自定义材料子程序对内聚力疲劳累积损伤模型进行编译,分别在基体/界面相的界面和纤维/界面相的界面设置内聚力单元,研究界面相性能参数对纤维增强橡胶密封复合材料(SFRC)界面疲劳损伤行为的影响。探讨了界面相厚度和模量的确定方法,获得了不同界面相厚度和模量下SFRC界面脱粘起始位置以及脱粘起始疲劳次数。结果表明,较低的界面相模量能够抑制界面脱粘的产生;随着界面相厚度的增加,界面脱粘的起始疲劳次数增加,SFRC抗疲劳损伤能力得到提高。The representative volume element(RVE)model composed of aramid fibers,interphase,rubber matrix and equivalent medium was established based on generalized self-consistent method.The self-defined material subroutine(UMAT)was used to compile the cohesive fatigue cumulative damage model.The cohesive elements were set respectively at matrix/interphase(MI)interface and fiber/interphase(FI)interface.The influence of interphase performance parameters on the interfacial fatigue damage behavior of SFRC was studied.The method to determine the thickness and modulus of interphase was investigated.The initial position of the interfacial debonding and the corresponding fatigue number of SFRC were obtained with different interfacial thickness and modulus.The results show that the interfacial debonding of SFRC will be restrained with lower interphase modulus,and the initial fatigue numbers of interfacial debonding of SFRC increase with the increase of interphase thickness.Therefore,the ability to resist the fatigue damage of SFRC can also be improved by increasing the interphase thickness.

关 键 词：纤维 复合材料 界面相 广义自洽方法 内聚力模型 

分 类 号：TQ330.1[化学工程—橡胶工业]