somusshabadi's blog

Hello Experts,

I am trying to do modal analysis on user-defined piezoelectric shell element. My eigen value probelm of free vibration is given in the attachment.

Hello Experts,

I have written a uel subroutine where I have totally 12 degree of freedom. Among these 12 degree of freedom, 6 are standard abaqus degree of freedom (3 Displacements and 3 Rotations) and another 6 are User defined degree of freedom. 

I assign these these degree of freedom in following way.

*USER ELEMENT,TYPE =U9, NODES=9,PROPERTIES=24,coordinates=3
1,2,3,4,5,6
9,1,2,3,4,5,6,7,8,9,10,11,12

Hello Experts,

I am trying to extract the eigenvalues of the User-Defined Element. I am getting following error when I try to extract frequencies using Lanczos method

*Frequency, eigensolver=Lanczos, acoustic coupling=off, normalization=displacement
3,,,, , ,

Please help me to resolve this error. Please find the message file in attachment.

Hello Abaqus Users,

I need to plot deflection (U3) along y axis when x = 0. How to achieve this in Abaqus?

Thanks and Regards,

Somu

Hello Experts,

I have written a Uel subroutine and trying to implement on a plate constrained at all the edges. 

My UEL Subroutine executes without any errors when the total number of elements are just 15 to 20. But when I increase the number of elements and mesh it more fine, My Uel subroutine aborts with ERROR Code 5.

If I print the JELEM, UEL Subroutine is aborting always at 52th Element, i.e when JELEM=52. Even when I remesh the structure with different size, Uel subroutine consistantly aborts for the 52ed element.

Hello All,

Does anyone have any idea how to automate meshing  using USER DEFINED ELEMENTS (for Example UEL) in Abaqus using python. Actually I need to mesh an arbitrary shaped structure  with 9-Node Quadrilateral Element. Abaqus doesn't support meshing of  9 Node Quad Element (S9R) either. 

Hello All,

I am Master student of Computational engineering at Ruhr University
Bochum, Germany. Presently I have to do testing and do post-processing of UEL Subrouitne for 9 NODE
Piezo-Electric Element .  I am not able to get the displacements of all  nodes in the
.dat file.  Below is my piece of code  of  INPUT file

*STEP,PERTURBATION
*STATIC
*NODE PRINT
U
RF
COORD
*endstep