Photoelastic plastic material and preparation method

Abstract

The invention relates to a photoelastic plastic material and a preparation method, which belong to the field of materials. The photoelastic plastic material comprises the following raw materials in percentage by weight: 80-100 epoxy resin, 24-60 maleic anhydride, and 32-80 dibutylphthalate. The invention can be used to simulate the stress state analysis of some complicated elements under small elasticoplastic deformation, for example, residual stress study of the elements (for example steel rails, steel plates) in the process of straightening and the like. The most economic photoelasticity method expresses the conspicuous advantage and is effective and convenient. The conventional photoelastic technology is only limited to study of stress and strain in the loading process but the stress and strain state after the loading process can not be studied. By adopting the photoelastic plastic material, after loading and obtaining the isochromatic line on a digital photoelastic instrument and unloading the photoelastic plastic material, changing of fringes in the unloaded photoelastic plastic material is observed. The material ensures that the residual stress of the element can change along with time and can be maintained for 15min.

Description

technical field [0001] The invention relates to a photoelastic plastic material and a preparation method thereof, and is characterized in that it relates to a photoelastic plastic material with component residual stress under the condition of small elastic plastic deformation, and belongs to the field of materials. Background technique [0002] Obtaining various mechanical quantities of structures by photoelasticity is a basic problem in engineering technology. Although a series of theoretical analysis methods have been established in engineering mechanics, structures and geometric shapes required in many high-tech fields It is particularly complex, and the load conditions and working environments (high temperature, high pressure, underground, liquid, strong magnetic field, strong radiation, dynamics, etc.) are becoming more and more diverse, making theoretical analysis very difficult; therefore, it is particularly important to use experimental methods. Even the only means. ...

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Problems solved by technology

[0002] Obtaining various mechanical quantities of structures by photoelasticity is a basic problem in engineering technology. Although a series of theoretical analysis methods have been established in engineering mechanics, structures and geometric shapes required in many high-tech fields It is particularly complicated, and the load conditions and working environments (high temperature, high pressure, underground, liquid, strong magnetic field, strong radiation, dynamic, etc.) are becoming more and more diverse, making theoretical analysis very difficult; therefore, it is particularly important to use experimental methods. even the only way

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