Figure 94. Cracks in beveled edge of acrylic plastic bearing surface for steel 

 insert in a 15-inch-diameter capsule after 72 hours of sustained 

 hydrostatic loading at 900 psi (looking at right angles to the 

 bearing surface). 



Figure 95. Cracks in the beveled edge of the acrylic plastic bearing surface for 

 steel insert in a 15-inch-diameter capsule after 72 hours of sustained 

 hydrostatic loading at 900 psi (looking at right angles to a cut through 

 the bearing surface). 



1 29 



