Controllable Delamination of CNT-Reinforced Carbon Fiber Films by Harnessing Mechanical and Topological Characteristics of the Composites  

作　　者：Yu Xie Zhuxuan Wei Weicong Zhang Ji Lin Jin Qian 

机构地区：[1]Department of Engineering Mechanics,Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Zhejiang University,Hangzhou 310027,China [2]Piezoelectric Device Laboratory,Faculty of Mechanical Engineering&Mechanics,Ningbo University,Ningbo 315211,China

出　　处：《Acta Mechanica Solida Sinica》2023年第6期770-782,共13页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Numbers:12125205,12072316,and 12132014);the Key Research and Development Program of Zhejiang Province(2021C01183);the Zhejiang Provincial Natural Science Foundation of China(LD22A020001).

摘　　要：Carbon nanotubes(CNTs)offer a remarkable reinforcement effect for the interlaminar toughness of laminated films,and optimizing the delamination of films through their toughening mechanism is of particular interest.Herein,we propose a theoretical model that combines the spatial evolution of aligned CNTs to describe the mode I fracture between opposing carbon fiber films.Our theoretical predictions quantitatively agree well with previous tests,and the influence of interfacial energy and modulus of films on toughness enhancement is considered.Our findings have demonstrated that aligned CNTs play a crucial role in enhancing delamination resistance,with the performance being highly sensitive to their volume fraction,mechanical properties,and geometric characteristics.We optimized interlaminar toughness by selecting appropriate strength and aspect ratio of CNTs based on two competitive failure modes.This work presents new concept for the topological design of composite laminates,bridging the properties of microfibers and macrostructures and ultimately achieving greater strength and toughness.

关 键 词：Interlaminar toughness DELAMINATION CNT reinforcement Carbon fibercomposite Failuremode 

分 类 号：TB33[一般工业技术—材料科学与工程]