Figure 92. Cracks in beveled edge of acrylic plastic bearing surface for steel 

 insert in a 15-inch-diameter capsule after 4,500 hours of sustained 

 hydrostatic loading at 750 psi (looking at right angles to the 

 external surface of the capsule). 



Figure 93. Cracks in beveled edge of acrylic plastic bearing surface for steel 

 insert in a 15-inch-diameter capsule after 4,500 hours of sustained 

 hydrostatic loading at 750 psi (looking at right angles to the bev- 

 eled bearing surface). 



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