3910 Measurement of Stress Field around Bifurcated Notch by Moire Interferometry

Abstract

Stress intensity factor of bifurcated notches are obtained by measuring opening displacement with Moire interfrometry. The bifurcation angle is 13.5 degrees that is the angle of bifurcation of fast propagating cracks. The measurement results say that the stress intensity factor of a bifurcated notch has the same value as that of the single notch whose length is the same as that of the bifurcated notch. This is caused by the small bifurcation angle.