Fig. 7.
The graph shows shear stress in kilo pascal on the vertical axis and shear strain in per cent on the horizontal axis. Shear stress decreases from about 240 kilo pascal at 0 per cent to about 20 kilo pascal near 0.5 per cent, then increases to about 290 kilo pascal at about 2.2 per cent. Point C is at about 240 kilo pascal at 0 per cent. Point D is near 0 kilo pascal at about 0.5 per cent. Point E is near 290 kilo pascal at about 2.2 per cent.Variation in shear stress at cavity wall during unloading