Holographic method for stress distribution analysis in photoelastic materials

Author(s)

da Silva, Sidney L. ; Prado, Felipe M. ; Brito, Isis, V ; Soga, Diogo ; Gomes, Ligia F. ; Wetter, Niklaus U. ; Muramatsu, Mikiya

• Document type: Journal article
• Source: AIMS MATERIALS SCIENCE; v. 11, n. 4, p. 14-pg., 2024-01-01.

Abstract

An alternative method to obtain the internal stress distribution in photoelastic materials using digital holography (DH) is presented. Two orthogonally polarized holograms were used to obtain the phase maps and analyzed using the proposed approach. This method directly determines the stress distributions from the phase differences obtained in the reconstructed phase maps, unlike methods obtained by photoelasticity. Optical information, such as index of refraction, phase differences, etc., are not measured directly in traditional photoelasticity. However, this approach was validated with both the finite element method and the RGB (red, green, and blue) photoelasticity method that is traditionally used. (AU)

• FAPESP's process: 12/18162-4 - Lasers in highly diffuse media for structural analysis of tissues
• Grantee: Niklaus Ursus Wetter
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/23700-4 - SPIE Photonics West LASE - 2020
• Grantee: Niklaus Ursus Wetter
• Support Opportunities: Research Grants - Meeting - Abroad
• FAPESP's process: 22/15276-0 - Optical neural networks with new non-linear activation functions for phase recovery applied to digital holography
• Grantee: Felipe Maia Prado
• Support Opportunities: Scholarships in Brazil - Doctorate