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Stress-driven integration strategies and m-AGC tangent operator for Perzyna viscoplasticity and viscoplastic relaxation: application to geomechanical interfaces

Author
Aliguer, I.; Carol, I.; Sture, S.
Type of activity
Journal article
Journal
International journal for numerical and analytical methods in geomechanics
Date of publication
2017-04
Volume
41
Number
6
First page
918
Last page
939
DOI
https://doi.org/10.1002/nag.2654 Open in new window
Repository
http://hdl.handle.net/2117/103372 Open in new window
URL
http://onlinelibrary.wiley.com/doi/10.1002/nag.2654/abstract Open in new window
Abstract
The paper proposes a stress-driven integration strategy for Perzyna-type viscoplastic constitutive models, which leads also to a convenient algorithm for viscoplastic relaxation schemes. A generalized trapezoidal rule for the strain increment, combined with a linearized form of the yield function and flow rules, leads to a plasticity-like compliance operator that can be explicitly inverted to give an algorithmic tangent stiffness tensor also denoted as the m-AGC tangent operator. This operator i...
Citation
Aliguer, I., Carol, I., Sture, S. Stress-driven integration strategies and m-AGC tangent operator for Perzyna viscoplasticity and viscoplastic relaxation: application to geomechanical interfaces. "International journal for numerical and analytical methods in geomechanics", Abril 2017, vol. 41, núm. 6, p. 918-939.
Keywords
finite element method, interface elements, viscoplastic relaxation, viscoplasticity
Group of research
MECMAT - Mechanics of Materials

Participants