Stress display

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Ingenium, 1968.0063.001
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OBJECT TYPE: N/A
DATE: Unknown
ARTIFACT NUMBER: 1968.0063.001

MANUFACTURER: Unknown
MODEL: Unknown
LOCATION: Unknown

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: Unknown

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 32.0 cm
Width: 37.0 cm
Height: 43.1 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Physics
Category: Mechanics
Sub-Category: N/A

Manufacturer

AKA: Unknown
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: Unknown
State/Province: Unknown
Period: Unknown
Canada: Probably used in Canadian classrooms/labs to demonstrate the location of stress points of a piece of plastic/plexiglass.
Function: Used to demonstrate stress applied to plexiglass.
Technical: An example of a teaching tool using the phenomenon of photoelasticity. Light from inside the box passes through a polarizing lens producing polarized light. Birefringence is a property by virtue of which a ray of light passing through a birefringent material experiences two refractive indices. Photoelastic materials exhibit the property of birefringence only on the application of stress. When a ray of plane polarised light is passed through a photoelastic material, it gets resolved along the two principal stress directions and each of these components experiences different refractive indices. The difference in the refractive indices leads to a relative phase retardation between the two component waves. The two waves are then brought together in a polariscope. Optical interference takes place and we get a colourful fringe pattern, which depends on relative retardation. Thus studying the fringe pattern one can determine the state of stress at various points in the material.
Area Notes: Unknown

Details

Markings: N/A
Missing: N/A
Finish: Unknown
Decoration: N/A

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Unknown Manufacturer, Stress display, Unknown Date, Artifact no. 1968.0063, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1968.0063.001/

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