Application of digital image correlation at the microscale in fiber-reinforced composites

Canal Casado, Luis Pablo and González Martínez, Carlos Daniel and Molina Aldareguía, Jon M. and Segurado Escudero, Javier and Llorca Martinez, Francisco Javier (2012). Application of digital image correlation at the microscale in fiber-reinforced composites. "Composites Part A: Applied Science and Manufacturing", v. 43 (n. 10); pp. 1630-1638. ISSN 1359-835X.

Description

Title: Application of digital image correlation at the microscale in fiber-reinforced composites
Author/s:
  • Canal Casado, Luis Pablo
  • González Martínez, Carlos Daniel
  • Molina Aldareguía, Jon M.
  • Segurado Escudero, Javier
  • Llorca Martinez, Francisco Javier
Item Type: Article
Título de Revista/Publicación: Composites Part A: Applied Science and Manufacturing
Date: October 2012
ISSN: 1359-835X
Volume: 43
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Digital image correlation (DIC) is applied to analyzing the deformation mechanisms under transverse compression in a fiber-reinforced composite. To this end, compression tests in a direction perpendicular to the fibers were carried out inside a scanning electron microscope and secondary electron images obtained at different magnifications during the test. Optimum DIC parameters to resolve the displacement and strain field were computed from numerical simulations of a model composite and they were applied to micrographs obtained at different magnifications (250_, 2000_, and 6000_). It is shown that DIC of low-magnification micrographs was able to capture the long range fluctuations in strain due to the presence of matrix-rich and fiber-rich zones, responsible for the onset of damage. At higher magnification, the strain fields obtained with DIC qualitatively reproduce the non-homogeneous deformation pattern due to the presence of stiff fibers dispersed in a compliant matrix and provide accurate results of the average composite strain. However, comparison with finite element simulations revealed that DIC was not able to accurately capture the average strain in each phase.

More information

Item ID: 16007
DC Identifier: http://oa.upm.es/16007/
OAI Identifier: oai:oa.upm.es:16007
Official URL: http://www.sciencedirect.com/science/article/pii/S1359835X1100220X
Deposited by: Memoria Investigacion
Deposited on: 18 Oct 2013 10:37
Last Modified: 01 Nov 2014 23:56
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