how to run uncoupled thermal stress analysis

[seepratik]

Hi everybody,



I have to run the thermal stress analysis due to very quick heat transfer. I completed the heat transfer step by using an fsi model cooling from a very high temerature to room temperature. Now i want to give the temperature time profile as input load from the heat transfer step in the stress analysis step as a second stage to find residual stresses. Can any body tell me how I can do that? I just tried it to make it run for the second analysis by opening the load module in the second analysis and selecting the heat transfer odb file, but there are some other staffs to be filled up like step, beginning and ending. What do they mean? Can any one help?



Thanks,

Pratik

 

[DanStro]

Pratik,

The manual has a couple of examples doing a sequential analysis. That's the best place to start.

Han primo incensus

 

[seepratik]

Hi DanStro,

Thanks for your reply.

I did not find any sequential thermal stress analysis except for the 1.6.4 Quenching analysis in abaqus benchmark manual. They have just some inp files with the heat transfer and stress analysis files separately. But I need to know how they linked them. As far as i understand by reasing thr manual, I tried to do this in my way, but the results are not matching with the coupled thermal stress analysis that I achieved satisfactorily from that example. Thats why i need to know some specific guidelines to make sure that I am correct. Here are these things:

1. When runnning the thermal stress analysis, I just showed the path of the file named heattransfer.odb. But there are some blank spaces like end step, end increment like that and I left all of them blank.
2. The constraints and boundary conditions I did not assign int the heat transfer step but in the thermal sress analysis.
3. the initial high temperature of the solid I have assigned for both models.

Am I right?

Somebody told me that I need to write the nodal temperature distribution for all the nodes in a text file in the heat trandfet amalisys and give them as a load input in he second step of themal stress analysis. Do you recommend that?

Pratik

 

[amubashar]

Consult Section 16.1.2 Sequentially coupled thermal-stress analysis of Abaqus Analysis User's Manual (Abaqus 6.12).