Full-field measurements of principal strains and orientations using moiré fringes

Q. Wang, S. Ri, Y. Takashita, S. Ogihara

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

2 Citations (Scopus)

Abstract

The principal strains at the microscale are the key parameters for evaluating the instability behaviors of materials. In this study, we developed a technique to acquire the full-field distributions of the principal strains and their orientations by integrating the scanning moiré method and the theoretical analysis of strain status. The normal strains in two perpendicular directions were first measured using the SEM scanning moiré fringes. The principal strains with orientations were then determined based on the analysis of strain status for plane stress problems. In this study, the maximum and the minimum principal strains and their orientations of carbon fiber reinforced plastics under a three-point bending test were measured. The maximum principal strain is greatest in the bottom-left region and the absolute value of the minimum principal strain is greatest in the upper-right region of this specimen. This technique is independent of the specimen grating direction and is useful to detect the potential failure characteristics of various composite materials.

Original languageEnglish
Title of host publicationAdvancement of Optical Methods in Experimental Mechanics - Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics
EditorsCesar Sciammarella, Luciano Lamberti, Sanichiro Yoshida
PublisherSpringer New York LLC
Pages251-259
Number of pages9
ISBN (Print)9783319415994
DOIs
Publication statusPublished - 2017
EventAnnual Conference on Experimental and Applied Mechanics, 2016 - Orlando, United States
Duration: 6 Jun 20169 Jun 2016

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume3
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Conference

ConferenceAnnual Conference on Experimental and Applied Mechanics, 2016
Country/TerritoryUnited States
CityOrlando
Period6/06/169/06/16

Keywords

  • Composite material
  • Deformation distribution
  • Moiré method
  • Orientation
  • Principal strain

Fingerprint

Dive into the research topics of 'Full-field measurements of principal strains and orientations using moiré fringes'. Together they form a unique fingerprint.

Cite this