Authors: Junjie Zhang Danqing Yi Bin Wang
Publish Date: 2016/12/19
Volume: 52, Issue: 7, Pages: 3992-4001
Abstract
The influence of ZnO nanowires on the interfacial micromechanical behavior of carbon fiber/epoxy microdroplet structures was studied using microRaman spectroscopy Carbon fibers were modified by adding ZnO nanowires to the surface to improve interfacial bonding strength using a hydrothermal method The distributions of axial stress shear stress and stress transfer efficiency in the epoxy microdroplet were then measured The results show that samples containing carbon fiber coated with ZnO nanowires had lower axial stress and larger interfacial shear stress than those with unmodified carbon fiber under the same strain Specifically under a 025 applied strain carbon fiber coated with ZnO nanowires showed increased maximum values of shear stress from 621 to 2280 MPa with maximum values of stress transfer efficiency increasing from 107 to 688 Under increased strain the stress transfer efficiency decreased due to the fracture of ZnO nanowires Two possible types of ZnO nanowire fracture modes are discussed and a model of microstress transfer is introduced
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