Help about DLOAD in Abaqus Subroutine

[luonganh89]

Hi all !

I want to ask a question about DLOAD in Abaqus. I want to call DLOAD at the beginning of each increment to change Pressure after each increment (Pressure from an external text file . Have you every done something like this. Can give me some advice ?

Thank you

[EngMech]

Hi, I have not done this before, but here are some suggestions:

1) Check the abaqus subroutine manual for the DLOAD information
2) Look for examples in the abaqus manual of DLOAD being used
3) In the DLOAD subroutine, you can use IF statements to define pressure at each increment, e.g. (not check the pressure commands and syntax)

IF(KINC.EQ.1) THEN
P=10
IF(KINC.EQ.2) THEN
P=20
...etc

4) Are you applying this to a single node or surface? I would be interested to know as I am looking to do similar things in my dynamics model. Through talking through it we may help each other.

I hope this helps

[luonganh89]

Dear EngMech

I've done something like that (3) but my target is call DLOAD at the beginning of increment and My Pressure is non-uniform distributed and I want take pressure from external text file and update to DLOAD sub

[Vaibhav13]

Hi EngMech

I tried to apply varying load with DLoad subroutine

I have the values in *.txt file, whenever i called subroutine it goes in a loop.

i.e. for each element it calls 19 values, can give me some advice?

Thanks

[luonganh89]

you should use RDFIL and DLOAD together ....

[Vaibhav13]

RDFIL ? or URDFIL?

[luonganh89]

Of course !!!using urdfil

[fremond khoo]

Hi Experts,

I wish to ask how do you define your distributed load with respect to coordinates and time using DLOAD file?

Lets say I want to have my distributed load along z-axes from 0 to 0.1m and time from 0 to 1s.
I understand that COORDS(3) represents z-coords and TIME(1) equals to time step in abaqus but how should I write them in user subroutine file? Could someone share some ideas in details regarding on this. Your help will be greatly appreciated. THanks