Reflectance difference laser measurements applied to the study of the stress/strain state in materials

Carlos H. Saucedo-Zárate, Maximo López-López, Carlos Sánchez-Lópezb, Jose Luis Correa-Figueroa, Jorge A. Huerta-Ruelas

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Development of experimental setup to study strain/stress state in materials emerges from a need to evaluate by a nondestructive and non-invasive technique the performance in new materials like semiconductor heterostructures, composite materials and alloys. The system was designed and built to be used as a multi-functional experimental setup. The main purpose is to characterize materials in elastic and plastic regime by reflectance difference laser measurements and strain gages. This system allows the generalization of results obtained from a theoretical model based in Finite Element Model and experimental measurements taken in finite specific points with strain gages. A NI™ platform is used for signal conditioning and processing. System built is described which includes an optical setup to measure reflectance difference laser (RDL), and a flexor which applies deformation in a link, with a micrometer. A correlation bigger than 0.95 was found between optical signal, strain gage signal, and finite element modeling.

Original languageEnglish
Title of host publicationSeventh Symposium Optics in Industry
DOIs
StatePublished - 2009
Externally publishedYes
Event7th Symposium Optics in Industry, VII SOI - Guadalajara, Jalisco, Mexico
Duration: 11 Sep 200912 Sep 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7499
ISSN (Print)0277-786X

Conference

Conference7th Symposium Optics in Industry, VII SOI
Country/TerritoryMexico
CityGuadalajara, Jalisco
Period11/09/0912/09/09

Keywords

  • Elastic deformation
  • Plastic deformation
  • Reflectance difference
  • Strain gages
  • Stress/strain

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