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A mechanical deformation is the change on a material when undergoes external impulses. Commonly, mechanical sensors such as strain gaugesStrain gauges, load cells, etc., can be applied to measure these deformations transducing mechanical energy into an electrical signal. Alternatively, optical methods such a shearing interferometer can be used to measure changes between an unperturbed object and the same object exposed to mechanical loads. In this work, through optical interferometry, the deformations suffered by a square piece of aluminum (sample under test) when it is subjected to mechanical forces in tensi onTension or compressionCompression will be analyzed. The results of the shearing interferometer are images (interferograms) that contains the information of the changes in the object under test. By applying an impulse force of 14.1 kg to the sample, the deformations can be appreciated using two different algorithms of interferogram analysis. The estimated deformations with the shearing interferometer are compared with a single strain gauge result, when it is situated on the opposite face of the aluminum piece and orientated in vertical or horizontal positions. The implemented optical test with the shearing interferometer gives reliable results to detect changes in both compressionCompression or tensionTension but results can be improved in future work considering the optical configuration, interferogram quality, mechanical stabilization and quantitative validation by means of a comparison with a different type of mechanical sensor.

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Measure Deformations in Materials Applied Interferometry and Mechanical Sensors

  • 会议论文

  • 发表日期：

    2025年

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  • Ernesto J. Ruiz-Ortega,
  • Francisco J. Casillas Rodriguez,
  • Jesús Muñoz-Maciel,
  • Francisco G. Peña-Lecona,
  • Miguel Mora-Gonzalez

摘要

A mechanical deformation is the change on a material when undergoes external impulses. Commonly, mechanical sensors such as strain gaugesStrain gauges, load cells, etc., can be applied to measure these deformations transducing mechanical energy into an electrical signal. Alternatively, optical methods such a shearing interferometer can be used to measure changes between an unperturbed object and the same object exposed to mechanical loads. In this work, through optical interferometry, the deformations suffered by a square piece of aluminum (sample under test) when it is subjected to mechanical forces in tensi onTension or compressionCompression will be analyzed. The results of the shearing interferometer are images (interferograms) that contains the information of the changes in the object under test. By applying an impulse force of 14.1 kg to the sample, the deformations can be appreciated using two different algorithms of interferogram analysis. The estimated deformations with the shearing interferometer are compared with a single strain gauge result, when it is situated on the opposite face of the aluminum piece and orientated in vertical or horizontal positions. The implemented optical test with the shearing interferometer gives reliable results to detect changes in both compressionCompression or tensionTension but results can be improved in future work considering the optical configuration, interferogram quality, mechanical stabilization and quantitative validation by means of a comparison with a different type of mechanical sensor.