Transmission-type photo-elastic instrument

Abstract

The invention relates to a transmission-type photo-elastic instrument comprising a support (1) and a rotation assembly; the rotation assembly is rotationally arranged in the support and comprises a plurality of rotary bodies (3), a plurality of optical elements and a fixing device (2); the rotating bodies are laminated from top to bottom and are arranged at intervals; the plurality of optical elements are fixedly arranged on the rotating bodies (3); and the fixing device (2) is used for fixing a sample (8) and enabling the sample (8) to generate stress and is arranged in the middle of the rotation assembly. Compared with the prior art, the transmission-type photo-elastic instrument in the invention has the advantages of being simple in structure, convenient to use, small in size and convenient to carry, and the cost can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of photomechanics, in particular to a transmission photoelasticity instrument. Background technique [0002] The photoelasticity method, referred to as the photoelasticity method, is an experimental technique that combines optics and mechanics for stress analysis. It has a history of nearly 200 years. The development of industry in the 19th century, the production of optical instruments and transparent plastics enabled the application and development of this method and formed an independent discipline. Compared with other experimental stress analysis techniques such as strain electrical measurement, the photoelastic method has the following characteristics: 1) The photoelasticity experiment is a model experiment. When the photoelastic model and the real object (or prototype) meet a certain similarity relationship, whether it is a large structure such as a bridge, a dam, an aircraft, a ship, or a gas turbine...

AI Technical Summary

Problems solved by technology

[0003] The photoelasticity instrument currently used in classroom teaching has a complex structure, requires a specific light source, requires multiple precision optical parts, and is large in size and high in cost, so it cannot be popularized in large quantities

At present, there are very few miniaturized transmission photoelastic instruments, which are inconvenient to carry, and it is also inconvenient to study small models, and most of them are horizontal structures

[0004] Chinese invention patent CN105928775 specification discloses a microphotoelastic experimental system for material micro-region stress field testing, including: a loading unit, including a clamp module for fixing the sample material and for applying a quantitative load to the sample material The load controller; the optical unit includes a microscope, a microphotoelasticity instrument placed in the microscope observation area and adapted to the microscope workspace; the optical components include a polarizer that can be moved out or into the optical path, two 1 / 4 wave film and an analyzer; the loading unit can be a loading testing machine capable of micro-stretching; although it can realize the function of an optical elastic instrument, its structure is relatively complicated and its cost is high, so it is not suitable for portability and popularization

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