Thermal and structural loading for each time step in thermal-structural analysis in ANSYS APDL? 2

[AnandaP]

I'm simulating an experiment in which a wood beam is submitted to thermal and structural loads at the same time. The beam is put in a furnace where temperature rises according to ISO curve and at the same time, it is loaded with a constant force for the entire experimet's time.
I've manage to do part of my routine in ANSYS APDL. I'm using the PHISICS command, where I first record the thermal field and then, using the ETCHG command, I record the structural field. I apply the thermal load, which is transient, using the *DIM command. In the structural field, I'm able to import the thermal results using the LDREAD command. But I'm not being able to load my beam with the structural load (9 kN). What I need is, for example, in time=5 seconds, apply thermal load of 96 degrees Celsius and the 9kN load at beam center. Record the results of this step to enter in the next, then at time=10 seconds, apply 146 degrees Celsius and the 9kN load and so on.
Can anyone help me to find a way to do this?
I'm attaching my code so you can get an idea of what I've done so far.

 

[scheah]

Hi AnandaP,

I'm not familiar with your specific type of problem but perhaps take a look at the post by PADT on direct coupled-field elements.


Kind regards,
Jason

 

[Erik Panos Kostson]

Hi

I do not know ANSYS (APDL) that well, but perhaps the LDREAD command imports one time(result) step, so one would need to loop through all thermal results in a for loop to get the whole transient thermo-mechanical event.

Alternatively as suggested one can perhaps use direct coupled field elements that have both translational degrees of freedom and a temperature formulation inbuilt in one element. Then one solves the coupled problem rather than transferring temperature data from a thermal to a structural analysis.

https://www.sharcnet.ca/Software/Ansys/16.2.3/en-us/help/ans_cou/Hlp_G_COU3_strtherm.html

Thank you -

Erik

 

[AnandaP]

Thank you for the tips, sk_cheah and Erik Panos Kostson! I'll take a look at it.