Characterization of R-curve behavior of translaminar crack growth in cross-ply composite laminates using digital image correlation

•The R-curves of translaminar fracture of composite laminates were measured by DIC.•Both of the nonlinear least-squares method and conservation integrals were applied.•The error analysis of least-squares method and conservation integral was conducted.•The effective crack length was determined from t...

Full description

Saved in:
Bibliographic Details
Published in:Engineering fracture mechanics 2014-02, Vol.117, p.51-70
Main Authors: Hou, Fang, Hong, Soonsung
Format: Article
Language:English
Subjects:
Anisotropy
Conservation
Correlation
Cross-ply composite laminates
Digital
Digital image correlation
Elastic anisotropy
Fracture mechanics
Laminates
R-curve
Stress intensity factor
Translaminar fracture
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The R-curves of translaminar fracture of composite laminates were measured by DIC.•Both of the nonlinear least-squares method and conservation integrals were applied.•The error analysis of least-squares method and conservation integral was conducted.•The effective crack length was determined from the far-field data.•Consistency was found between the results of two methods. This paper presents experimental methods to estimate crack-tip field parameters and characterize R-curve behaviors of translaminar fracture in cross-ply composite laminates using digital image correlation. The investigated crack-tip field parameters include stress intensity factor, energy release rate and effective crack length. The nonlinear least-squares method and conservation integrals are used to determine these parameters from elastic far-field displacements, based on the homogeneous approximation of anisotropic solids for composite laminates. The sources of error of the two parameter-estimation methods are investigated. The results of the two methods show good consistency. Finally, the two-stage rising R-curves are obtained with acceptable accuracy.
ISSN:0013-7944
1873-7315
DOI:10.1016/j.engfracmech.2014.01.010