- Title
- A comparative study of Maxwell viscoelasticity at large strains and rotations
- Creator
- Schrank, Christoph E.; Karrech, Ali; Boutelier, David A.; Regenauer-Lieb, Klaus
- Relation
- ARC.DP140103015 http://purl.org/au-research/grants/arc/DP140103015
- Relation
- Geophysical Journal International Vol. 211, Issue 1, p. 252-262
- Publisher Link
- http://dx.doi.org/10.1093/gji/ggx297
- Publisher
- Oxford University Press
- Resource Type
- journal article
- Date
- 2017
- Description
- We present a new Eulerian large-strain model for Maxwell viscoelasticity using a logarithmic co-rotational stress rate and the Hencky strain tensor. This model is compared to the small-strain model without co-rotational terms and a formulation using the Jaumann stress rate. Homogeneous isothermal simple shear is examined for Weissenberg numbers in the interval [0.1; 10]. Significant differences in shear stress and energy evolution occur at Weissenberg numbers >0.1 and shear strains >0.5. In this parameter range, the Maxwell–Jaumann model dissipates elastic energy erroneously and thus should not be used. The small-strain model ignores finite transformations, frame indifference and self-consistency. As a result, it overestimates shear stresses compared to the new model and entails significant errors in the energy budget. Our large-strain model provides an energetically consistent approach to simulating non-coaxial viscoelastic deformation at large strains and rotations.
- Subject
- creep and deformation; fault zone rheology; rheology; crust and lithosphere; rheology and friction of fault zones
- Identifier
- http://hdl.handle.net/1959.13/1352334
- Identifier
- uon:30859
- Identifier
- ISSN:0956-540X
- Language
- eng
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