EFOC 歪みゲージ測定システム付き光弾性実験装置



Unit for photoelasticity practices, illustrating the subjects of the Photoelasticity theory, the Elasticity theory, Strength of Materials, andStructure theory.




Unit for photoelasticity practices, illustrating the subjects of the Photoelasticity theory, the Elasticity theory, Strength of Materials, andStructure theory.

It is very suitable for the introduction and study of photoelasticity: optical elements, isochromatic, isoclinic, band order, band factor, edgetensionsing, and for strain and stress analysis and measurement with strain gauges.

With the aid of the SCADA system it is possible to analyze and process the captured data during test experiments, making measurementswith strain gauges.

Using this unit photoelastic experiments and practices of transparent test specimens (models) may be performed.

The different test specimens are subjected to loading by external forces and have poralised light shone through them.

A load application element can apply tensile, bending, compressive, and distributed and punctual loads to the specimen.

The stresses and strains occurring in the test specimen are represented as bright spots or figures of different colours, and we can visualisethe distribution of stress.

We offer a wide range of test specimens for making a variety of practices and experiments.

These specimens show a full color and high contrast results and are also made of a special very hard material that avoids breaking duringdaily use.

The unit includes specimens with strain gauges and the accessories (electronic, mechanical and software) for acquiring all the values in thecomputer in real time and allows to compare the advantages of one method with the other.

It is also very useful for Young`s module determination of the material and fringe order and band order calculation.

This Computer Controlled Unit is supplied with the EDIBON Computer Control System (SCADA), and includes: The unit itself + aControl Interface Box + a Data Acquisition Board + Computer Control, Data Acquisition and Data Management Software Packages, forcontrolling the process and all parameters involved in the process.



  1. Introduction to photoelasticity: optical elements, isochromatic,isoclinic, band order, band factor, edge tension sign, etc.
  2. Determination of principal stress difference.
  3. Isochromatics.
  4. Illustration of the themes about elasticity, strength of materialsand structures using photoelastic tests.
  5. Pure traction/optical-tensional law.
  6. Diametrically compressed disc.
  7. Ring with diametrical compression traction.
  8. Ring with diametrical compression.
  9. Plate with circular drill with traction.
  10. Comparison of the effects from different engraves in piece withtraction.
  11. Pure traction in a piece with section linearly variable.
  12. Pure flexion.
  13. Simple flexion.
  14. Simple flexion, compound beams.
  15. Compound flexion.
  16. Compound central core of the section.
  17. Piece with a great curvature subjected to flexion.
  18. Arch built-in with a central charge.
  19. Triangular structure.
  20. Comparison of the structures.
  21. Comparison of the effect of different notches.
  22. Strain and stress analysis and measurements with strain gaugesusing computer.
  23. Tardy compensation method (requires EFO-ICL).


  1. Many students view results simultaneously.To view all results in real time in the classroom by means of aprojector or an electronic whiteboard.
  2. Open Control, Multicontrol and Real Time Control.This unit allows intrinsically and/or extrinsically to change thespan, gains, proportional, integral, derivative parameters, etc,in real time.
  3. The Computer Control System with SCADA allows a realindustrial simulation.
  4. This unit is totally safe as uses mechanical, electrical/electronic,and software safety devices.
  5. This unit can be used for doing applied research.
  6. This unit can be used for giving training courses to Industrieseven to other Technical Education Institutions.
  7. Control of the EFOC unit process through the control interfacebox without the computer.
  8. Visualization of all the sensors values used in the EFOC unitprocess.
  9. Several other exercises can be done and designed by the user.