Simultaneous 3D digital holographic interferometry for strain measurements validated with FEM
详细信息 查看全文
- 作者：Araceli S¨¢nchez A. ; Manuel H. De la Torre Ibarra ; Fern ; o Mendoza Santoyo ; Tonatiuh Saucedo-A ; Donato Reyes R
- 关键词：Digital holography ; Strain measurement ; Nondestructive testing ; Finite element method
- 刊名：Optics and Lasers in Engineering
- 出版年：2014
- 出版时间：January, 2014
- 年：2014
- 卷：52
- 期：Complete
- 页码：178-183
- 全文大小：2587 K
文摘
This work introduces a digital holographic interferometer in a simultaneous 3D configuration to detect superficial strains. The system uses a single monochrome sensor and three different lasers in a two exposure method, which can successfully measure the superficial deformation during a controlled deformation. An aluminum plate with a well-known geometry is used as a proof of principle. The deformation and all physical variables are simulated with a finite element algorithm. The comparison between the experimental and the simulated results helps to validate the system's measurements with very good agreement. A description of the technique is presented.