Fig. 4
From: Fracture saturation in paintings makes them less vulnerable to environmental variations in museums
Distributions of horizontal stress σxx in the flaw-free islands of gesso. The distributions are plotted as a function of a fraction of normalized distance between cracks for various S/t ratios. Gesso elasticity modulus was Egesso = 1.2 GPa. Wooden support was 10 mm thick and initially cupped with r = 5 m