Photoelastic Demonstration Technical Description: Photoelasticity can be used to demonstrate distribution of stress and stress concentrations in component models. Using polarised light, the distribut...
Photoelasticity can be used to demonstrate distribution of stress and stress concentrations in component models. Using polarised light, the distribution of stress in flat, transparent bodies (plastic models) is investigated. Polarisation filters represent the distribution of stress in colours. The notching and point loading and the criteria dictating component design are clearly visualised. This is portable to use with overhead projectors. Various models made of transparent plastic are mounted in a frame. A load application device is used to apply compressive or tensile loads to the model under investigation by means of a spindle. An arrangement of polarisation filters and quarter wave filters generates optionally plane or circular polarised light. A green filter is supplied as part of the package to generate monochromatic light. The light source is an overhead projector. The use of monochromatic light produces a system of dark and light stripes providing indications of the distribution and magnitude of mechanical stresses. The supplied models represent typical examples, permitting experimentation in relation to notching and point loading. The distribution of stress shown in the model is identical to that in the actual part under design. Additional models are also available to represent distribution of stresses in bolted connections, roller bearings, wrenches and tooth profiles.All the component elements of the experiment are clearly laid-out and housed securely in a box. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
- 2 filter, enclosed in glass, each comprising - 1 polarisation filter, diameter: d=165mm - 1 quarter wave filter, diameter: d=165mm - 1 green filter, diameter: d=150mm
- load force: 0...250N 8 models, PC - bar without notches - bar with hole - bar notched on one side - bar notched on both sides - rectangle without cut-outs - rectangle with cut-outs - fork - crane hook
Photoelasticity can be used to demonstrate distribution of stress and stress concentrations in component models. Using polarised light, the distribution of stress in flat, transparent bodies (plastic models) is investigated. Polarisation filters represent the distribution of stress in colours. The notching and point loading and the criteria dictating component design are clearly visualised. This is portable to use with overhead projectors. Various models made of transparent plastic are mounted in a frame. A load application device is used to apply compressive or tensile loads to the model under investigation by means of a spindle. An arrangement of polarisation filters and quarter wave filters generates optionally plane or circular polarised light. A green filter is supplied as part of the package to generate monochromatic light. The light source is an overhead projector. The use of monochromatic light produces a system of dark and light stripes providing indications of the distribution and magnitude of mechanical stresses. The supplied models represent typical examples, permitting experimentation in relation to notching and point loading. The distribution of stress shown in the model is identical to that in the actual part under design. Additional models are also available to represent distribution of stresses in bolted connections, roller bearings, wrenches and tooth profiles.All the component elements of the experiment are clearly laid-out and housed securely in a box. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
- 2 filter, enclosed in glass, each comprising - 1 polarisation filter, diameter: d=165mm - 1 quarter wave filter, diameter: d=165mm - 1 green filter, diameter: d=150mm
- load force: 0...250N 8 models, PC - bar without notches - bar with hole - bar notched on one side - bar notched on both sides - rectangle without cut-outs - rectangle with cut-outs - fork - crane hook
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