m 



500 psi 750 1000 1250 1500 1750 2000 2250 2600 

 COLOR STRESS CONVERSION CHART 



2750 3000 3250 3500 3750 4100 4250 4500 4750 



Material: Plexiglass "G" | flH X ^Specimen: 4x2x0.5 inches 



looti (oioi cooiioi micms q 



5000 5250 5500 5750 6000 6500 7000 7500 8000 



Loading: Uniaxially compressed Lighting: Circularly polarized white light 

 at 1000 psi/minute in a light field polariscope. 



Figure B-1. Color stress conversion table for 0.5-inch-thick grade G Plexiglas 

 acrylic plastic under short-term uniaxial compressive loading in a 

 light-field polariscope utilizing a circularly polarized transmitted 

 white light; stress values shown are for the principal stress. 



177 



