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Damage models implementation in ABAQUS
Tue, 2011-07-19 02:33 - Hakkı ISIK
Hi all
I am M.Sc. sutdent in Istanbul Technical University and my research subject is comparision of several ductile damage models both computationaly and experimentally.
I am trying to compare ductile damage models such as Freudenthal,Cockroft,Ayada ,Brozzo etc. computationally using ABAQUS and seeking a way to implement these damage models in ABAQUS.
To obtain each models damage result individually should damage model be implemented in ABAQUS or can a regular tensile test results be used for calculation of damage values.
Could you please advise me for methodolgy to run a simulation to obtain ductile damage values accordng to models mentioned above.
Thanks in advance for your help.
Hakkı ISIK.
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Reference for methodology
This is not for metals, but an example that might help you understand the Abaqus implementation issues is
Marcelo Canga, Eric B. Becker, Şebnem Özüpek, Constitutive
Modeling of Viscoelastic Materials with Damage - Computational Aspects",
Computer Methods in Applied Mechanics and Engineering, Vol.190,
pp.2207-2226,2001
These authors took a state variable approach.
http://www.invariantlabs.com
Damage models implementation in Abaqus
Hi.
You can find the simple and efficient methodology for elasto-plastic model implementation in papers:
M. Halilovic, M. Vrh, B. Stok, “NICE - An explicit numerical scheme for efficient integration of nonlinear constitutive equations”, Mathematics and Computers in Simulation, 80/2, 294-313, 2009
and
M. Vrh, M. Halilovic, B. Stok, “Improved explicit integration in plasticity”, International Journal for Numerical Methods in Engineering, 81, 910-938, 2010
where GTN plasticity damage model is implemented as an example. The procedure is explicit, simple (similar as forward-Euler scheme), fast and accurate. Folowing the scheme presented it is easy to implement also other plasticity damage models.