Temporal and spatial evolution of bursts in a fiber bundle model of creep rupture

Zsuzsa Danku, Ferenc Kun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present a theoretical study of the creep rupture of heterogeneous materials based on a fiber bundle model which provides a direct connection between the microscopic fracture mechanisms and the macroscopic time evolution. In the model, material elements fail either due to immediate breaking or undergo a damage accumulating ageing process. We found that on the micro-level the competition of the two failure modes gives rise to bursts of breakings with power law distributed size and waiting time between events. We demonstrate that approaching macroscopic failure the system accelerates which can be fully described as a non-homogeneous Poissonian process for long range load sharing, however, when localization occurs breaking events get clustered. Bursts are composed of sub-avalanches which lead to a non-trivial temporal shape comparable to measurements. The pulse shape proved to be sensitive to the range of load sharing.

Original languageEnglish
Title of host publicationMaterials Structure and Micromechanics of Fracture VII
Pages773-776
Number of pages4
DOIs
Publication statusPublished - Jan 14 2014
Event7th International Conference on Materials Structure and Micromechanics of Fracture, MSMF 2013 - Brno, Czech Republic
Duration: Jul 1 2013Jul 3 2013

Publication series

NameKey Engineering Materials
Volume592-593
ISSN (Print)1013-9826

Other

Other7th International Conference on Materials Structure and Micromechanics of Fracture, MSMF 2013
CountryCzech Republic
CityBrno
Period7/1/137/3/13

Keywords

  • Acoustic bursts
  • Avalanche
  • Creep rupture
  • Fiber bundle model
  • Pulse shape

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Temporal and spatial evolution of bursts in a fiber bundle model of creep rupture'. Together they form a unique fingerprint.

  • Cite this

    Danku, Z., & Kun, F. (2014). Temporal and spatial evolution of bursts in a fiber bundle model of creep rupture. In Materials Structure and Micromechanics of Fracture VII (pp. 773-776). (Key Engineering Materials; Vol. 592-593). https://doi.org/10.4028/www.scientific.net/KEM.592-593.773