generate stress patterns with linear or circular polarised light
- Photoelasticity is a proven method of analysing and recording mechanical stresses and strains in components.
- It is used both for quantitative measurements and for demonstrating complex stress states.
- The components used are models made of a transparent, photoelastically sensitive plastic, which becomes optically birefringent under mechanical load.
- FL 200is used to conduct photoelastic experiments on plane, transparent plastic models.
- The models are subjected to load by external forces, and they are radiated by circular polarised light.
- An analyser analyses the light penetrating the body.
- The experimental setup comprises the separate components: a light source, two linear polarising filters (polariser and analyser), two quarter-wave filters and a frame in which the models are attached and subjected to load.
- The light source optionally permits coloured stress patterns with white light or a light/dark representation with monochromatic light.
- The polariser includes a polarising filter and a quarter-wave plate and generates circular polarised light.
- Behind the model is a second quarter-wave plate (perpendicular to the first one), which is combined with a second polarising filter.
- These form the analyser.
- The filters are mounted on rotating bearings and fitted with angle scales.
- Various polycarbonate models are mounted inside the frame.
- A load application device applies bending, tensile or compressive load to the model through a spindle.
- Stresses and strains occurring in the model are identifiable as bright spots, visualising the distribution of stress.
- The order of the dark isochromats is analysed to determine the principal stress differential.
- A wide selection of models such as notched bars, a wrench and a model-roller bearing or a rack-and-pinion is available as accessories.
- These ensure the implementation of comprehensive experiments.
- It is also possible to investigate your own models.
- produce the mechanical stress curves through photoelastic experiments
- 2 linear polarising filters (polariser and analyser)
- 2 quarter-wave filters for generating circular polarised light
- all filters have 360° angle scale and indicate the main optical axis
- filters mounted on roller bearings and can be pivoted
- white light produced by a fluorescent tube and two incandescent bulbs
- monochromatic light (yellow) generated by sodium vapour lamp
- frame cross-members can be vertically adjusted
- pressure or tensile forces generated by a threaded spindle
- finished polycarbonate (PC) models available as accessories for the demonstration
- Light source:
- lamp box with white diffuser
- for white light:
- 1 fluorescent tube TL-E 32W/33 (colour: 33)
- 2 incandescent bulbs, candle lamp, frosted E14, 230V, 25W
- for monochromatic light (yellow):
- 1 sodium vapour lamp SOX35, 35W
- Filter, mounted in glass, diameter: Ø 425mm:
- 2 polarising filters (dark olive)
- 2 quarter-wave filters (uncoloured)
- Frame: W x H: 600x750mm
- 230V, 50Hz, 1 phase
- 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
- UL/CSA optional
Dimensions & Weight:
- L x W x H: 800x600x750mm
- Weight: approx. 50kg
- together with the accessories or your own models:
- generate plane stress states in various models under load: bending, tensile load and compressive load
- investigate stress distributions with linear or circular polarised light
- interpret photoelastic fringe patterns: stress concentrations, zero points, neutral strands, areas of constant stress and stress gradients
- graphically and computationally determine the stresses
Scope of Delivery:
- 1 frame with load application device
- 2 polarising filters
- 2 quarter-wave filters
- 2 filter mounts
- 1 light source
- 1 set of accessories
- 1 set of instructional material
- monochromatic or white light
- models for specific problems can be prepared by the user.
- WP 300.09Laboratory trolley
- FL 200.01Set of 5 photoelastic models
- FL 200.02Model arch
- FL 200.03Model crane hook
- FL 200.05Set of 3 photoelastic models, comparison of notches
- FL 200.06Model stresses on weld seams
- FL 200.07Model wrench
- FL 200.12Photoelastic material
- FL 200.81 Ring force gauge 200 N
- FL 200.82 Ring dynamometer 500N
- FL 200.83 Ring dynamometer 1000N
- FL 200.84 Ring dynamometer 2000N
Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.