Shell element

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Shell element

Postby behzad1980 » Wed Sep 29, 2010 12:56 pm


I want to know whether opensees recent released version can analyze nonlinear shell elements or not.

I've already modeled a bridge deck with shell MITC4 but the program can't converge but when I change shell elements to beam column elements, It works!!!

Could u please tell me if opensees has any problem in shell analysis or I made a mistake in their modeling.

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Postby fmk » Wed Oct 06, 2010 10:07 am

if the beam-column model works stick with that.
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Re: Shell element

Postby suiwenwu » Sun Dec 14, 2014 9:58 pm

Do you mean that you use shellMITC4 to run the dynamic analysis? Does it have something wrong with the mass modeling?
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Re: Shell element

Postby fmk » Mon Dec 15, 2014 9:10 am

if, like the rest of the contiinuum elements, the materials at the gauss points have a density associated with them, the element will use them to form the mass matrix.
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Re: Shell element

Postby mohammadjjj » Thu May 26, 2016 1:13 am

Dear Users

I want to use ShellMITC4 as a pile cap, but after defining a shell element using four Peripheral nodes, the OSP doesn't show any shell element!!, it just shows an ordinary element between two early nodes among four nodes defined as peripheral nodes!!!
In addition, what does it mean with the command mentioned "input must be in counter-clockwise order around the element"!!
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Re: Shell element

Postby sb1966 » Sat Jul 02, 2016 10:21 am

it is reg your last question, about CCW node numbering. Assume that you have a 4 noded element whose nodes are 1 (LowerLeft), 2 (LowerRight), 3 (UpperRight) and 4(UpperLeft). Then you may write
element $eleType $eleTag 1 2 3 4
Alternatively you can also write
element $eleType $eleTag 2 3 4 1
But you can't write
element $eleType $eleTag 2 1 4 3 because now you are numbering the nodes in CW fashion.
Hope this helps.
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Re: Shell element

Postby hamiddehnavi » Wed May 24, 2017 4:15 am

i can't get localforce response of this element...but it get me just force...can you help me?
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