Characterization of R-curve behavior of translaminar crack growth in cross-ply composite laminates using digital image correlation
作者： Fang Hou , Soonsung Hong
DOI: 10.1016/J.ENGFRACMECH.2014.01.010
关键词: Consistency (statistics) 、 Nonlinear system 、 Stress intensity factor 、 Composite material 、 Materials science 、 Fracture (geology) 、 Strain energy release rate 、 Digital image correlation 、 Anisotropy 、 Composite laminates
摘要: Abstract 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 include stress intensity factor, energy release rate effective crack length. nonlinear least-squares method conservation integrals are used determine these from elastic far-field displacements, based on the homogeneous approximation anisotropic solids for laminates. sources error two parameter-estimation investigated. results show good consistency. Finally, two-stage rising -curves obtained with acceptable accuracy.
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