Scale-free features of temporal localization of deformation in late stages of creep failure

Tero Makinen*, Juha Koivisto, Lasse Laurson, Mikko J. Alava

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The last stage of material failure often shows a regime with power-law acceleration as the material lifetime is approached. We study this experimentally in tensile creep with paper samples using digital image correlation. The last, tertiary creep stage exhibits scale-free features in the sample response (strain rate) and its fluctuations. It is accompanied by an increasing localization of strain at the location of final failure. The main features are reproduced by a material model built on a viscoelastic fiber bundle model.

Original languageEnglish
Article number093606
Pages (from-to)1-6
Number of pages6
JournalPhysical Review Materials
Volume4
Issue number9
DOIs
Publication statusPublished - 18 Sep 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • RUPTURE
  • TIME

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