Full-field strain measurements at the micro-scale in fiber-reinforced composites using digital image correlation

被引：124

作者：

Mehdikhani, Mahoor ^{[1
]}

Aravand, Mohammadali ^{[1
]}

Sabuncuoglu, Baris ^{[1
]}

Callens, Michael G. ^{[1
]}

Lomov, Stepan V. ^{[1
]}

Gorbatikh, Larissa ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Leuven, Belgium

来源：

COMPOSITE STRUCTURES | 2016年 / 140卷

关键词：

Digital image correlation (DIC); Scanning electron microscopy (SEM); Micro-mechanics; Polymer-matrix composites (PMCs); Finite element analysis (FEA); SCANNING-ELECTRON-MICROSCOPY; LARGE-DEFORMATION MEASUREMENTS; QUANTITATIVE SMALL; CARBON NANOTUBES; VALIDATION; BEHAVIOR; MAGNIFICATIONS;

D O I：

10.1016/j.compstruct.2015.12.020

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Few studies have been conducted to monitor inter-fiber deformations in fiber-reinforced composites. In the present work, we demonstrate full-field strain measurements in the composites at the micro-scale, using digital image correlation (DIC). The study is performed on a unidirectional glass fiber reinforced composite loaded in transverse three-point bending inside an environmental scanning electron microscope. A nano-scale random speckle pattern of high quality is created. Validity of the measured fields is assessed against results of a finite element (FE) model with boundary conditions retrieved from the experiment. A good agreement is found between the DIC-measured and FE-predicted results. The precise recognition of very small-scale strain concentrations requires enhancement of the correlation process and removal of microscopy imperfections. The investigated methodology shows promise for real-time deformation measurements in composites at the micro-scale. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：192 / 201

页数：10

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