Finite Element simulation of a sharp crack
A Finite Element simulation was carried out on the same loading setup as the polycarbonate studied previously. A sharp crack was used, i.e. an infinitely small crack tip radius.
The stress perpendicular to the crack plane, σ11, decreases with distance from the crack tip:
This curve can be fitted closely to a r−1/2 curve, showing that our prediction for the stresses ahead of a crack tip is accurate.