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COBEM 2019
25th International Congress of Mechanical Engineering
LOW-COST AUTOMATED POLARISCOPE FOR THE IMPLEMENTATION OF A DIDACTIC LABORATORY IN SOLID MECHANICS.
Submission Author:
Brenda Nascimento Bandeira , PI
Co-Authors:
Brenda Nascimento Bandeira, Bruno Luz, Alexandre de Maciel, Antonio Coelho
Presenter: Brenda Nascimento Bandeira
doi://10.26678/ABCM.COBEM2019.COB2019-1831
Abstract
It is not novelty that engineers use the transmission photoelasticity for stress analysis and observation of structures submitted to different loads. This method enables an entire field of analysis, both qualitatively and quantitatively, thus facilitating the studies and research related to Solid Mechanics widely discussed in Engineering. For the use of theis technique, an instrument called polariscope is required. It can use either planare or circular type of polarization of light and the model of study has to be made of a birefringent non-opace material. In this sense, we aimed the creation of a low-cost transmission polariscope built-in MDF and polarizing films. To enable the films to be rotated together or separately, it was decided to insert step motors connected to an Arduino UNO board. Submitting a model based on the resin to a diametrically applied tension and analyzing the images, the photoelastic constant is quantified. The experiment showed that the built structure and the method used are adequate for the visualization of photoelastic patterns and for quantitative and qualitative analysis at the educational level for teaching in Engineering, being possible to extend its application to research in different areas.
Keywords
Transmission Photoelasticity, Stress Analysis, Birefringent Material, Plane Polariscope, Circular Polariscope
