Mz $matTag

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engnomran
Posts: 55
Joined: Fri Jul 04, 2014 9:57 pm
Location: International Institute of Earthquake Engineering and Seismology(IIEES)

Mz $matTag

Post by engnomran »

Hi dear all
I don't underestand why in all examples in under commend -T $matTag , -My $matTag and -Mz $matTag have uniaxial Material Elastic equal zero ?


uniaxialMaterial Elastic 1 137520
uniaxialMaterial Elastic 2 0.0

element flatSliderBearing 1 1 2 1 250.0 -P 1 -T 2 -My 2 -Mz 2 -orient 1 0 0


thanks
Last edited by engnomran on Wed Jul 09, 2014 11:49 pm, edited 1 time in total.
maksins
Posts: 32
Joined: Sun Jun 19, 2011 10:28 am
Location: University at Buffalo

Re: Mz $matTag

Post by maksins »

It's because bearings are very flexible in the rotational direction, zero resistance in torsion. Although I don't know assigning zero would create any problem in inversion of stiffness matrix. I would assign very small values.
Manish Kumar
Department of Civil, Structural and Environmental Engineering
University at Buffalo, The State University of New York

http://www.manishkumar.org
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