4 noded shell element with 6dof
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hi,
please help in writting matlab program for a cylinder using 4-noded shell element having 6dof per node.
3 Comments
Tim O
on 15 Nov 2016
PLEASE Knor, Could you help me with program on bending analysis of circular plates with following boundary conditions 1. Simply supported 2. Clamped edge 3. Half clamped and half simply supported. LOADINGS Uniformly distributed load on both and centre concentrated load on both. Thanks hope to hear from you soon Tim O
Accepted Answer
Sean de Wolski
on 9 Dec 2011
A starting point for an element stiffness matrix
K_el = zeros(24); %4nodes@6dof/node
This will be a very weak element until you populate it with stiffness values derived from the shell element equations.
3 Comments
Sean de Wolski
on 12 Dec 2011
I have an idea, but there are many different types of shells and you probably know a whole lot more about what you want for your _specific_ case.
More Answers (1)
KSSV
on 15 Dec 2011
Implementing shell element formulation in matlab is bit tough. You must have good experience in FEM formulation in MATLAB. For shell there are many formulations in FEM:
1. Plate elements combine bending and plane stress.
2. Degenerated shell elements
3. Assumed Natural strain shell elements etc..
It involves many transformations. I found one implementation of shell element in mathworks. (<http://www.mathworks.com/matlabcentral/fileexchange/11905)>.
To use this one should have good idea on FEM. You can refer to Finite Element Method - Cook for the formulation.
Sreenu
https://sites.google.com/site/kolukulasivasrinivas/
2 Comments
KSSV
on 16 Dec 2011
Hello
You must remember that, in this combination of plate element and plane stress element, there will be five degrees of freedom. And the sixth one is included as drilling degrees of freedom. You have to fix the value of drilling degrees of freedom such that whole solution is not effected. Refer the elemental formulation and then put into code. Refer FEM - zienkowicz. It is given nice in that as well....
Sreenu
https://sites.google.com/site/kolukulasivasrinivas/
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