Solving dynamic solid mechanics problem using explicit time stepping scheme

[Max]

Hi all,

I am wondering if Moose has the capability of solving dynamic solid mechanics problem using a explicit time stepping scheme?  Something similar to Abaqus Explicit, using a central difference scheme with lumped mass. 

Thank you,

Xiao

[Andrew....@csiro.au]

Hi Xiao,

I believe the answer is “no”.  HOWEVER, if I’m wrong, this should definitely be documented on mooseframework.org.  It would be a great feature to have in moose.  Things like reduced integration would also be great.  So much to do, so little time to do it!

a

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[Cody Permann]

I will note however that we have many of the pieces to head in that direction. We do have the ability to do explicit time integration in the framework. As Andy points out, this capability just hasn't been a high priority for our customers at the lab.

Cody

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[Derek Gaston]

You can definitely solve a dynamic solid mechanics problem. However, I think we can only do it implicitly currently.

To add the time derivative to the solid mechanics equations you would use the SecondDerivativeImplicitEuler Kernel here: https://github.com/idaholab/moose/blob/devel/modules/solid_mechanics/include/kernels/SecondDerivativeImplicitEuler.h

Maybe one of the SolidMechanics/TensorMechanics guys can chime in with a good example...

Derek

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[Jason D. Hales]

See http://mooseframework.org/wiki/PhysicsModules/TensorMechanics/Dynamics/ and the moose/modules/tensor_mechanics/tests/dynamics/ folder.

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Jason D. Hales, PhD

Department Manager

Fuels Modeling & Simulation

Idaho National Laboratory

(208) 526-2293