Abstract
In mechanics of materials it is important to know the stress–strain relation of each material in order to understand their behaviour under different loads. Optical methods are used for determine different kind of stresses and interferometry is the most used tool. In this work it is presented a new alternative to determine the stress–strain based in one beam which is reflected in the surface of the material while it is in a compression test as the ASTM indicates. It is taken the material as a reflective surface which acts as a spherical mirror and it will scatter light, the scattered area will increase as the deformation increases. The reflected beam is analysed applying beam propagation equations and Digital Image Processing for getting the increase of the scattered area. Finally it is plot the relation between the applied stress and the beam propagation. There is also presented the accuracy, sensitivity and a theoretical demonstration of the method.
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Acknowledgement
Alonso Saldaña Heredia wants to thank CONACYT for the grant No. 360140.
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Heredia, A.S., Aguilar, P.A.M., Ocampo, A.M. (2017). Aluminum Strain Measurement by Beam Propagation. In: Martínez-García, A., Furlong, C., Barrientos, B., Pryputniewicz, R. (eds) Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications, Proceedings of the 5th International Symposium on Experimental Mechanics and 9th Symposium on Optics in Industry (ISEM-SOI), 2015. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-28513-9_2
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DOI: https://doi.org/10.1007/978-3-319-28513-9_2
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