Open Access
ARTICLE
An Experimental Study on Crack Bifurcation by Optical Methods
S. Suzuki1
1 Toyohashi University of Technology, Toyohashi, Aichi, Japan
Structural Longevity 2012, 8(1), 7-14. https://doi.org/10.3970/sl.2012.008.007
Abstract
Two kinds of experiments are described on rapid crack bifurcation.
One is static experiments with stationary bifurcated cracks. The static experiments
demonstrate
COD method that measures crack opening displacement,
COD, to obtain stress intensity factor of bifurcated cracks. Moirè interferometry is used to
measure
COD. The other is dynamic experiments on bifurcation of fast propagating cracks. High-speed holographic microscopy is applied to take photographs of
rapidly bifurcating cracks and to measure
COD of the cracks. The measured
CODs
give the energy release rate of bifurcating cracks through the
COD method developed in the static experiments. The experimental results say that energy release rate
increases gradually and continuously across the bifurcation point.
Keywords
Cite This Article
Suzuki, S. (2012). An Experimental Study on Crack Bifurcation by Optical Methods.
Structural Longevity, 8(1), 7–14.