FEAP User Forum
FEAP => General questions => Topic started by: Colin McAuliffe on July 17, 2012, 10:08:31 AM
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Hello all,
Does FEAP have commands to define Robin BC's such as surface convection and elastic boundaries?
Thanks
Colin
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For simple elastic boundaries you could use elastic springs (point elements) or nodal springs. For more complex BC a user element is probably the best way to go.
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Colin,
Have a look at http://www.ce.berkeley.edu/~sanjay/FEAP/lysmer.html for an example user element for a 'complex' boundary condition: d[traction]/dt + M v = 0 where traction = sigma^T n, M is a matrix, and v = velocity.