* 
Table B-2. Mechanical Properties of Acrylic Plastic 
Plate Used for the Fabrication of Test Windows 
Compressive Yield, psi 
(ASTM D-695) 
Compressive Modulus of Elasticity, psi 5 6 5 
(ASTM D-695) Holl x IO” "56.2 x LO N5.3 x IO 
Deformation Under Compressive Load, percent 
(ASTM D-621-64; 4000 psi at 122°F for 24 hrs.) 
Ultimate Strength, psi 
D-638-64) 
Modulus of Elasticity, psi 5 5) 5 
D-6 38-64) 4.4 x 10 Ss apa 0) 4.6 x 10 
Elongation at Failure, percent 
D-638-64) 
Strength, psi 
FTO) 16,700 
4.7 x 10° /4.8 x 10 |4.9 x 10 
Modulus of Elasticity, psi 5 5 5 
D-790) 
Shear Strength, psi 
(ASTM D-732) 
* 
Plexiglas G acrylic plastic meeting MIL-P-21105C specification. 
Test specimens were cut from plate prior to shrinking it at 300°F. 
33 
