FEAP User Forum

FEAP => Input File Issues => Topic started by: ibry on June 30, 2017, 07:46:42 AM

Title: CSURf command
Post by: ibry on June 30, 2017, 07:46:42 AM

Hello everyone,

I am trying to model a 3-D beam subjected to surface loading on top surface of the beam using displacement control.
But I don't know how to write the command udof after csurf, disp, and surface
CSURf
DISP
SURF
...
For everyone who knows the problem, please give me an example.
Thank you in advance.

Title: Re: CSURf command
Post by: Prof. S. Govindjee on June 30, 2017, 08:08:07 AM

Here is an example that moves the top of the beam 3.3 units in the 2-direction, when the top of the beam is located at 4 units in the 3-direction.  The extent in the 1- and 2-directions is [0,1] x [0,10].

Code: [Select]

csur
 disp,2
 surface
 1,0,0,4,3.3
 2,1,0,4,3.3
 3,1,10,4,3.3
 4,0,10,4,3.3
 

Title: Re: CSURf command
Post by: ibry on June 30, 2017, 08:27:54 AM

Thank you for your reply, Prof. Govindjee,

I have used the command as you said.
However, I found that all the results are zero.
I have checked it in the output file that the surface displacements are included.
Maybe did I miss something?

Regards.

Title: Re: CSURf command
Post by: Prof. S. Govindjee on June 30, 2017, 08:38:52 AM

You probably forgot to also set the boundary codes on the top surface.  Here is a complete input file.

Title: Re: CSURf command
Post by: ibry on June 30, 2017, 08:43:24 AM

Thank you very much, Prof. Govindjee.
Problem is solved.

Regards.