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M8-14: PHOTOELASTICITY 9 years 7 months ago #1061

  • zzfixk21
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ID Code: M8-14
Purpose: Demonstrate photoelasticity in plastic.
Description: The system of mounted rotating polaroids in front of a goose neck lamp is used with various stress samples for this demonstration. Rotating either polaroid shows how polaroids work. With the two polarizers crossed, a U-shaped piece of plastic is held between the two crossed polaroids (left) and squeezed at its ends to produce stress patterns (right) with varied colors and intensities. A plastic sheet (provided) can be stretched or a McDonald's plastic salad bar container stressed during manufacture (also provided) can be positioned between the polaroids to show similar patterns.
Availability: Available

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