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Pre-Yield Shear in Glasses

[+] Author Affiliations
Alexander Patashinski

Northwestern University, Evanston, IL

Paper No. IMECE2013-62299, pp. V009T10A092; 4 pages
doi:10.1115/IMECE2013-62299
From:
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5638-3
  • Copyright © 2013 by ASME

abstract

A glassy material is treated as a mosaic of soft and hard clusters. Plastic shear under high shear stress takes place in soft clusters as a series of elementary local slip and stick processes; stress-strain relations are discussed in terms of these elementary acts and their activation energies. Two special situations are considered: a glass where the initial distribution of soft clusters is created by damaging irradiation or other factors, and disappears in the process of shear, and a glass where interaction of soft and hard clusters maintains a time-independent distribution of activation energies.

Copyright © 2013 by ASME

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