Abstract
The optical method of photoelasticity was used to measure stress field and stress intensity factors of crack with the presence of holes in a polycarbonate PSM-1 birefringeant plates under tension. Tests were used for variable numbers and dimensions of holes. The present study takes into account the several positions of holes and crack in plates. Stress intensity factor has been determined from the crack tip fringe pattern by multiple points' technic. Experimental results have been confirmed with a good agreement numerical estimation of stress intensity factors obtained with the finite element method (FRANC 2D).
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