generate stress patterns with linear or circular polarised light in typical polycarbonate components

Description:

• Photoelasticity can be used to demonstrate stress profiles and stress concentrations in component models.
• The distribution of stress in plane, transparent bodies (plastic models) is investigated using polarised light.
• Polarising filters represent the stress profiles in colour.
• The notching and point loading and the criteria dictating component design are clearly visualised.
• The FL 210unit can be used with overhead projectors.
• Various transparent plastic models are mounted inside a frame.
• A load application device is used to apply pressure or tensile loads to the model under investigation through a spindle.
• An arrangement of polarising filters and quarter-wave filters generates either linear or circular polarised light.
• A green filter to generate monochromatic light is also part of the scope of delivery.
• The light source is an overhead projector (e.g., FL 210.01).
• The use of monochromatic light produces a system of dark and light stripes, which reflect the distribution and magnitude of mechanical stresses.
• The models which belong to the scope of delivery represent typical components, permitting experimentation in relation to notching and point loading.
• The stress profiles shown on the model are identical to those in real-world components.
• Additional models are also available to represent stress profiles in roller bearings, tooth flanks, screw connections and wrenches.
• All parts of the experiment are clearly laid out and securely housed in a storage system.

Technical Details:

Specification:

• photoelastic experiments with an overhead polariscope
• polariser and analyser each comprise a polarising filter and a quarter-wave filter
• filter enclosed, with stress-free glazing
• all filters arbitrarily rotatable in the horizontal plane
• linear or circular polarised light possible
• green filter for monochromatic light
• load application device with force gauge for pressure and tensile load
• eight different polycarbonate models are delivered
• storage system for parts

Technical Data:

• Filter bracket with polariser and analyser:
  • diameter of filters: Ø 165mm
• 1 green filter, diameter: Ø 150mm
• Load application device with force gauge:
  • load force: 0…250N
• 8 models, PC:
  • unnotched bar
  • bar with hole
  • bar notched on one side
  • bar notched on both sides
  • rectangle without recesses
  • rectangle with recesses
  • fork
  • crane hook

Dimensions & Weight:

• L x W x H: 500x190x30mm (frame)
• L x W x H: 280x280x90mm (filter bracket)
• Weight: approx. 8kg
• L x W x H: 1170x480x178mm (storage system)

Learning Objections/Experiments:

• generate plane stress states in various models under load
  • compressive load
  • tensile load
• investigate stress distributions with linear and circular polarised light
• interpret photoelastic fringe patterns
  • stress distribution
  • stress concentration

Scope of Delivery:

• 1 frame with load application device
• 1 filter bracket with polariser and analyser
• 1 green filter
• 8 photoelastic models
• 1 storage system with foam inlay
• 1 set of instructional material

Features:

• demonstration unit as an attachment for an overhead projector
• generate stress patterns with linear or circular polarised light in typical polycarbonate components
• detect stress concentrations

Accessories:

• Optional:
  – FL 210.01 Overhead projector- FL 210.10 Model bolted connection

  – FL 210.11 Model roller bearing

  – FL 210.12 Model wrench with counterpart

  – FL 210.13 Model pinion

  – WP 300.09 Laboratory trolley

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.