Regarding displacement condition in proportional loading

[Rahul]

Hello,

I am using proportional loading in the following way for the 2d elasticity problem.

load prop 2
 !FORCe
  !3  0 0.0 100
  !4  0 0.0 100
 DISP
  3 0 0.0 0.9
  4 0 0.0 0.9
load end

BATCh
 PROP,,2
END
 2 2
 0 0  1 1

The above-given loading is working fine if I am applying force, but it's not working with displacement conditions.

Could you please help me to find out the error here?

Thank you!
Regards
Rahul Jangid

[Rahul]

Hello,

For details please have a look at the attached input file.

Regards
Rahul Jangid

[Prof. R.L. Taylor]

Did you fix dogs where displacements are applied?

[Rahul]

Hello,

No, I didn't fix nodes where I am applying displacement. I have four nodes at two nodes, I fixed the displacement, and for the remaining two nodes, I am applying displacement. I have only a four nodes single element here.

For details, Please, Have a look at the attached input file of the last message.

Thank you for your quick reply !!

Regards
Rahul Jangid

[JStorm]

You need to constrain the DOFs where you want to apply displacement BCs, e.g. via BOUNdaray.
You also should add an empty line after each block in the input file in order to avoid misinterpretation by FEAP.

[Prof. R.L. Taylor]

You have several errors in the input file.  Also never try to run 100 steps before you have a working file.  Always check the O*** file to make sure that the commands your specified are interpretted correctly (you can check the log file L*** also for a summary of the mesh commands that were used).

1. Always leave a blank line before at the end of every mesh data set.

2. Add the missing BOUN commands for node 3 & 4

3. Add an END command after the LOAD END

4. Add a BATCH command before the NOPRint -- each command set needs a BATCh/END pair

5. Add an END command to terminate after the NEXT.

[Rahul]

Hello,

Thank you for the detailed explanation. Now, It is working fine.


Regards
Rahul Jangid