A new type of numerical experiment on the spatial and temporal patterns of localization of deformation in a material with a coupling of grain size and rheology [rapid communication] - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Earth and Planetary Science Letters Year : 2005

A new type of numerical experiment on the spatial and temporal patterns of localization of deformation in a material with a coupling of grain size and rheology [rapid communication]

Mark Jessell
  • Function : Author
Esteban Siebert
  • Function : Author
Paul Bons
  • Function : Author
Lynn Evans
  • Function : Author
Sandra Piazolo
  • Function : Author

Abstract

The patterns of localization of deformation in recrystallising materials are investigated via a series of two-dimensional grain-scale numerical simulations. These simulations couple a grain-size and strain dependant viscous rheology with grain size reduction and grain growth processes. The simulations are able to predict the mechanical, microstructural and strain evolution of the polycrystals to moderate strain, and allow us to examine the nature of the time dependent feedback between mechanical and microstructural behavior. It was found that significant strain localization occurred only when the grain size dependence of the viscosity was non-linear, and was greatly enhanced by the activity of the grain-size modifying processes. The intensity and location of the zone of strain localization varied spatially and temporally, and displayed two length and time scales, with the result that the finite strain state showed a much broader, and hence less intense, zone of localized deformation than the instantaneous state.
No file

Dates and versions

insu-03642990 , version 1 (15-04-2022)

Identifiers

Cite

Mark Jessell, Esteban Siebert, Paul Bons, Lynn Evans, Sandra Piazolo. A new type of numerical experiment on the spatial and temporal patterns of localization of deformation in a material with a coupling of grain size and rheology [rapid communication]. Earth and Planetary Science Letters, 2005, 239, pp.309-326. ⟨10.1016/j.epsl.2005.03.030⟩. ⟨insu-03642990⟩

Collections

INSU
1 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More