Evaluating path of stress triaxiality to fracture of thin steel sheet using stereovision

D. Kanazawa, S. Chinzei, Y. Zhang, K. Ushijima, J. Naito, S. Yoneyama

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

Abstract

A stereovision technique based on digital image correlation is applied to the evaluation of the stress triaxiality and fracture strain of thin steel sheet. A tensile testing specimen with notches made of high strength steel sheet is loaded and the surface displacements are measured from both sides of the specimen surface using two stereovision systems. Not only the in-plane strains but the through-thickness strains are evaluated from the measurement results of the displacements on the both surfaces of the specimen. The variation of the stress triaxiality at an evaluation point is evaluated from the measured strains. The fracture strain is also evaluated from the strain measurement results. Experimental results show that the stress triaxiality and the fracture strain of thin steel sheet can be evaluated by the surface strain measurement. The results can be utilized for simulating deformation and predicting fracture of a component made of thin steel sheet.

Original languageEnglish
Title of host publicationAdvancement of Optical Methods in Experimental Mechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics
EditorsLuciano Lamberti, Cosme Furlong, Cesar Sciammarella, Ming-Tzer Lin
PublisherSpringer New York LLC
Pages37-41
Number of pages5
ISBN (Print)9783319630274
DOIs
Publication statusPublished - 2018
EventAnnual Conference and Exposition on Experimental and Applied Mechanics, 2017 - Indianapolis, United States
Duration: 12 Jun 201715 Jun 2017

Publication series

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

Conference

ConferenceAnnual Conference and Exposition on Experimental and Applied Mechanics, 2017
Country/TerritoryUnited States
CityIndianapolis
Period12/06/1715/06/17

Keywords

  • Digital image correlation
  • Fracture strain
  • Stereovision
  • Stress triaxiality
  • Through-thickness strain

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