ABAQUS static analyses continuig steps

[lubos38]

Hi all,

Could someone help me with problem with abaqus.
Is any possibilty set up in one deck in static analyzes steps which can start always in new model. For example:
Step 1 Force 1000N -- results and back to start possition
Step 2 Force 2000N -- results and back to start possition

Thanx and regard

 

[corus]

The Abaqus forum would be better for this, however, if I understand the question then in a static analysis the 2nd step will produce results from an apparently unloaded model if yield hasn't been exceeded.

corus

 

[lubos38]

Hi

Thax for replay, but Im afraid that isnt so good, I need step two without any residual stress or strain as uloading.
Step two should start with exatly first base position.
Thanx
P.S: Where I find abaqus forum?

 

[sendy]

Hi Lubos38,
I am sorry I don't really understand your question. You try to calculate step 2 without any stress or strain memory from those in step 1 --> does it mean that step 1 and 2 have nothing to do each other ?? If so, you're trying to do two different analysis.

Then, If you try to continue your loading of 1000N in step 1 to be 2000N, so you just need to specify loading of 2000N in step 2 because Abaqus will take cumulative value in the each step.

To join abaqus mailing list:

http://groups.yahoo.com/group/abaqus/join

or you may also find group discuss about abaqus in this mailing list (in part named Engineering Computer Program).

sendy

 

[lubos38]

Hi sendy,

Thats a point, with small difference, I would like to try, but I dont know if it possible make in FEM implicit/ABAQUS/ this kind of definition simulations.
Two independet steps, lets say, in one simulation, exatly on static with variable force in each step.

Any Idea?

 

[sendy]

Hi Lubos38,
If you mean as the following:

1. Modeling node,element,material,boundary condition.
2. Initialization condition of state variables (stress, strain, void ratio, poisson ratio, etc) and displacement).
3. Loading step 1: Prescribing Force 1.
4. Print out the result.
5. Initialization condition of state variables (stress, strain, void ratio, poisson ratio, etc) and displacement)..
6. Loading step 2: Prescribing Force 2.
7. Print out the result.
8. ...

I would say you try to do a parameter study since there is no corelation (in the sense of stress memory) between your step 1 (apply Force 1) and step 2 (apply Force 2); so I just have idea of using a parameter option (use it for prescribing the Force) in Abaqus; then create a short code to read and develop some input files (with one prescribed force for one input file), and also a code to run those input files in abaqus program. Thus, finally you would have some output files which corresponds to each input files.

hope this idea helps abit.
sendy.