Bending simulation
Altair EmployeeHi
i am doing 3 point roll bending simulation in that i need to gradually increase the top roller displacement (i.e) at first stage top roller displacement is given as 2 units then the plate is rolled.
After this i need to apply the top roller displacement at the same point on the plate and again rolling need to be done. since it is having friction and slip i cant able to find position at the exact point. is there any way to do by creating a separate engine file or any other way like .sta file
thanks
Shrinaath
Answers
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Hi Shrinaath
Please have a look at the tutorial RDT:3595 from Radioss online help. It may help you.
Thanks
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hi pranav hari
thanks for your reply
my work is simulation of 3 point roll bending in that top roller is moved in vertical direction and bend the plate then the peripheral velocity is given to the roller to bend the plate all over its length. i am trying to do more detailed way by apply small displacement and rolling the plate then again apply the displacement and roll the plate.
i have done simulation for the first displacement and first pass it working properly i am having problem in the second displacement.
i need to apply the second displacement at the same point of the plate where the first displacement is applied on the plate, since it is time dependent i cant able to position the same point because of friction and slip between plate and the roll.
is there any other way to do this second displacement by taking the first pass results and positioning the plate then run the simulation.
please check the files.
thanks.
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hi pranav hari
can we start the simulation with the deformed model in the previous simulation with exact stress and strain state?????
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hi pranav hari
sure
i need to apply the displacement at the same point (middle of the plate) where first displacement is applied. i have checked with Tstart/Tstop parameter for boundary constrain it is not working. is there any other way....
https://community.altair.com/community?id=community_question&sys_id=045644b61b2bd0908017dc61ec4bcbbcin this topic they have used the second engine file.....
thanks
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Hi Shrinaath
You have the option to export the deformation of the plate as a .rad file from Hyperview. Then you can import this .rad file into a new HM window, where you will get the deformed model obtained from your first simulation.
Load your results in HyperView and stop the animation at the time where you want to export your results.
Then export the results as a solver deck (.rad file)
<?xml version="1.0" encoding="UTF-8"?>
Then open a new HM session and import the file you have just exported from HyperView (deformed.rad file). Tick the FE overwrite option.
Then you will get the deformed file from your first simulation.
<?xml version="1.0" encoding="UTF-8"?>
I hope this will help you.
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hi pranav hari
if i do like this means does i need to assign the boundary condition, material laws etc to this model
then the material behavior will change know
i need the results like stress and strain in first pass should carried to second pass
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Hi Shrinaath
You don't need to assign the boundary conditions and materials again.
While importing into new HM session, first import your original model and then import the deformed model by merging.
This will recollect all the material and boundary condition data of your model.
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hi pranav hari
thanks for ur reply. i have one more doubt during first pass material undergoes plastic deformation so that material properties of plate will change during first pass, does the change of properties will be taken into account if we do like this?????
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Hi Shrinaath
On doing this the deformed model is imported or merged with the FE. That means it will incorporate the plastic deformation happened with the previous simulation. Then the material properties can be applied to the model again and do the second simulation.
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