Type of Test 



Tensile strength 

 (ultimate) 



Tensile modulus 

 of elasticity 



Tensile elongation 

 at failure 



Shear strength 

 (ultimate) 



Compressive 

 deformation under 

 load 



Compressive strength 

 (yield) 



Compressive modulus 

 of elasticity'' 



Flexural strength 

 (ultimate) 



of elasticity 



Table F-1 . Mechanical Properties of Acrylic Plastic Plates 

 (Test specimens formed from unshrunk, 48x60 x2.5-in. grade G Plexiglas.) 



Specimen Size 



0.250 in. thick x 

 0.500 in. wide 



0.250 in. thick x 

 0.500 in. wide 



0.250 in. thick x 

 0.500 in. wide 



0.250 x 1.000-in. 

 disc, punched out 



0.500 x 0.500 x 

 0.500 in. 



0.500 x 0.500 x 

 1.500 in. 



0.500 x 0.500 x 

 1.500 in. 



0.250 in. thick x 

 0.500 in. wide 



0.250 in. thick x 

 0.500 in. wide 



Test Condition 



0.05-in./min 

 crosshead speed 



0.05-in./min 

 crosshead speed 



0.05-in./min 

 crosshead speed 



0.05-in./min 

 crosshead speed 



4,000-psi sustained 

 load for 24 hr 



0.05-in./min 

 crosshead speed 



0.05-in./min 

 crosshead speed 



0.1 1-in./min 

 deflection rate 

 on 4.0-in. span 



0.1 1-in./min 

 deflection rate 

 on 4.0-in. span 



23 U C and 

 50% RH 



23°C and 

 50% RH 



23 C and 

 50% RH 



23 U C and 

 50% RH 



122°F 



23 C and 

 50% RH 



23 U C and 

 50% RH 



23°C and 

 50% RH 



23 U C and 

 50% RH 



NCEL 



Material 



Specification 



9,000 psi 



8,000 psi 



2% max 



15,000 psi 

 420,000 psi 



14,000 psi 

 420,000 psi 



No. of Test 

 Specimens That 



Failed to 

 Meet Minimum 

 Specification" 



8,400 psi 



8,360 psi 



0.6% 



13,100 psi 

 420,000 psi 



13200 psi 

 390,000 psi 



10,800 psi 



13,000 psi 



2.5% 



17,100 psi 

 650,000 psi 



17,200 psi 

 500,000 psi 



" 38 specimens for each type of test. All of the specimens that did not meet specifications 

 came from the same acrylic plastic plate, which was rejected as a result of it. 



Modulus based on linear stress/strain rate only. 



205 



