Shear banding observed in real-time with a laser speckle method

Pasi Karppinen, Antti Forsström, Kimmo Mustonen, Sven Bossuyt*

*Corresponding author for this work

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

Abstract

In many high-strength materials, such as in metallic glasses, localized deformations can lead to quasi-brittle behavior where the amount of energy dissipated by mechanical deformation prior to material failure is small, as only a small volume fraction of the material deforms inelastically. Thus, techniques that allow observations of localized deformations at relevant length and time scales are instrumental in order to engineer such materials. Here, a real-time optical system based on high-speed imaging of laser speckle is applied to the propagation of shear bands in metallic glass. The quality and accuracy of information obtainable by this technique as well as its applicability to study important aspects of shear banding in metallic glasses are discussed and a comparison with more conventional approaches are presented.

Original languageEnglish
Title of host publicationAdvancement of Optical Methods in Experimental Mechanics - Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics
Pages327-333
Number of pages7
Volume3
DOIs
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication
EventSociety for Experimental Mechanics Annual Conference & Exposition on Experimental and Applied Mechanics - Orlando, United States
Duration: 6 Jun 20169 Jun 2016

Conference

ConferenceSociety for Experimental Mechanics Annual Conference & Exposition on Experimental and Applied Mechanics
Abbreviated titleSEM
CountryUnited States
CityOrlando
Period06/06/201609/06/2016

Keywords

  • High-speed imaging
  • Laser speckle
  • Metallic glass
  • Real-time
  • Shear band

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    Karppinen, P., Forsström, A., Mustonen, K., & Bossuyt, S. (2017). Shear banding observed in real-time with a laser speckle method. In Advancement of Optical Methods in Experimental Mechanics - Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics (Vol. 3, pp. 327-333) https://doi.org/10.1007/978-3-319-41600-7_41