三维四向编织复合材料界面损伤机理数值分析  

Numerical analysis on interface damage mechanisms of 3D four-directional braided composites

作　　者：张超[1] 周晔欣[2] 杨志贤[1] 许晓静[1] ZHANG Chao ZHOU Yexin YANG Zhixian XU Xiaojing(School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China)

机构地区：[1]江苏大学机械工程学院,镇江212013 [2]江苏大学土木工程与力学学院,镇江212013

出　　处：《复合材料学报》2016年第9期1989-1998,共10页Acta Materiae Compositae Sinica

基　　金：江苏省自然科学基金(BK20150479);江苏省博士后基金(1402101C);江苏大学高级专业人才科研启动基金(14JDG136)

摘　　要：考虑界面脱粘表面压应力下摩擦力对材料界面力学性能的影响,建立损伤-摩擦相结合的界面本构模型,编写用户材料子程序VUMAT,实现其在有限元软件ABAQUS中的嵌入。基于周期性胞元分析思想,在单胞模型中纤维束/基体、纤维束/纤维束分界面引入界面单元,结合损伤-摩擦相结合的界面本构模型,建立含界面相三维四向编织复合材料的细观有限元模型。模拟典型载荷下界面损伤的起始和扩展过程,分析界面应力传递和界面破坏机理,研究界面性能对复合材料宏细观力学性能的影响规律,为实现三维四向编织复合材料界面性能优化设计和控制提供参考。Considering the effect on material interfacial mechanical properties caused by friction which appears on the debonding interface under compression stress,a damage-friction combination interface constitutive model was proposed.Then a user material subroutine VUMAT involved this constitutive model was developed and implemented in finite element software ABAQUS.In conjunction with the damage-friction interface combination constitutive model,a meso finite element model of 3Dfour-directional braided composites based on the periodic unit-cell was established.In the unit-cell model,the interface element was introduced in the yarn/matrix and yarn/yarn interfaces.The initiation and propagation of interface damage under typical loads were simulated,and the mechanisms of interface stress transfer and interface failure were revealed.The effect rule of interface properties on macro-and micromechanical properties of composites were studied,which provides a reference for optimizing design and control of the interface performance of 3Dfour-directional braided composites.

关 键 词：三维四向编织 复合材料 界面 损伤机制 数值分析 

分 类 号：TB330.1[一般工业技术—材料科学与工程]