Application of Electronic Speckle Pattern Interferometry Method for Simultaneous Measurement of Young’s Modulus and the Poisson’s Ratio of Metals

Proceedings

Michtchenko, Alexandre¹ 

[1] Instituto Politécnico Nacional, Seccion de Estudios de Posgrado e Investigación, ESIME-ZAC, México 07738, Mexico

关键词: electronic speckle pattern interferometry;    Poisson’s ratio;    Young’s modulus;   

DOI  :  10.3390/ICEM18-05396

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

In this paper, mechanical experiments with a low-cost interferometry set-up are presented. The set-up is suitable for an undergraduate laboratory where optical equipment is absent. The arrangement consists of two planes of illumination, allowing the measurement of the two perpendicular in-plane displacement directions. An axial load was applied to three different metals, and the longitudinal and transversal displacements were measured sequentially. A digital camera was used to acquire the images of the different states of the load of the illuminated area. A personal computer was used to perform the digital subtraction of the images to obtain the fringe correlations, which are needed to calculate the displacements. Finally, Young’s modulus and Poisson’s ratio of the metals were calculated using the displacement data.

【 授权许可】

CC BY