Photoelasticity: Investigating the distribution of strains in mechanically stressed bodies

VP5.4.2.3
Photoelasticity: Investigating the distribution of strains in mechanically stressed bodies
Photoelasticity: Investigating the distribution of strains in mechanically stressed bodies Photoelasticity: Investigating the distribution of strains in mechanically stressed bodies (P5.4.2.3)
Photoelasticity: Investigating the distribution of strains in mechanically stressed bodies

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Description

In the experiment P5.4.2.3, the magnitude and direction of mechanical stresses in transparent plastic models are determined. The plastic models become optically birefringent when subjected to mechanical stress. Thus, the stresses in the models can be revealed using polarization-optical methods. For example, the plastic models are illuminated in a setup consisting of a polarizer and analyzer arranged at right angles. The stressed points in the plastic models polarize the light elliptically. Thus, the stressed points appear as bright spots in the field of view. In another configuration, the plastic models are illuminated with circularly polarized light and observed using a quarter-wavelength plate and an analyzer. Here too, the stressed points appear as bright spots in the field of view.

Components of equipment sets

1 47195  4  Photoelastic models, set of 4 LD
2 472401  8  Polarisation filter LD
2 472601  8  Quarter-wavelength plate, 140 nm LD
2 46008  8  Lens in frame, f=150 mm LD
1 46025  8  Prism table LD
1 46026  8  Iris diaphragm LD
1 460310  8  Optical bench, S1 profile, 1 m LD
1 460311  8  Clamp rider with clamp 45/65 LD
8 460312  8  Clamp rider with clamp 45/35 LD
1 44153  8  Screen, translucent LD
1 30011  4  Saddle base LD
1 450641  8  Halogen lamp 12 V, 50/100W LD
1 45063  4  Halogen bulb 12 V/100 W, G6.35 LD
1 45066  8  Picture slider LD
1 726890  4  DC-High Current Power Supply 1...32 V/0...20 A LD
2 500624  4  Safety connecting lead 50 cm, black LD
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