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Dear Sir,
I am working on the impact analysis of the bullet on the kevlar fibre i have given the velocity 950 m/s but the simulation is not running properly. kindly provide your guidelines
Thanks
RAM
Hi,
Please make sure that the unit should be consistent.
In input deck of /BEGIN first two lines of input unit & working unit should be same.
Regards
Rahul R
Units are consistence in my file
How long it is running?
26.06 secs
<?xml version="1.0" encoding="UTF-8"?>
looks like Run completed.What problem you are facing?
Yes sir, the run is completed but the bullet is not moving as expected..
I shared my model to you sir kindly check and inform the corrections to be made....
I don't see any Engine parameter in your deck. Please define common engine parameter & run.
See attached screenshot for the same.
I have already defined all engine parameters but while generating deck file from hypermesh it doesn't exported.however selected the merge starter and engine icon during export and generated the deck file with engine parameters as you mentioned but while solving geeting zero or negative volume for 3D element error 166
Ram
Use the small strain formulation with 8 integration points solid elements to overcome this negative volume error.
Set Isolid =14 with Inpts =222. Also set Icpre =1 for elastic or visco-elastic material law, and Icpre =2 for elasto-plastic laws.
This should fix the error and give you good results, let me know if this helps.
See attached Doc as well.
Unable to find an attachment - read this blog
Same error occurs after the corrections made as per your instruction.
Share the updated file to my FTP.
File shared
Did you receive my updated model which i had send yesterday.
I got your model yesterday.Let me take a look and get back to you.
I am awaiting for your guidelines Sir
Hi Ram,
As I have told in an earlier post, please check your interface definition,
Please go through the examples and tutorials available on RADIOSS help for more information.
I have created the interface between the bullet and composite fibre.
Type 7
Master part = Bullet
Slave part = composite fibre.
I have updated the parts and review the components ..
What error i have done in this interface please mention Sir,It will be helpful for my current and future work
Ram,
in your model you hvae used type 20.
Though this will work but there is no master and slave surfaces defined in this contact. Please check.
I have used type 20 as well as type 7 and checked the model for the run but the same error occurs.
Kindly find the screenshot below
You need to create a contact surface and node group for slave and master segments when you use type7
Selecting components when creating type 7 may not work.
What is the procedure for it?
Is there is any tutorial for it?
As per your instruction I have created the contact surfaces on the Composite fiber and created entity node sets on the bullet and updated the interfaces then run the simulation but the same error occurs.
The contact direction is wrong in your model.
I suggest you to go through the tutorials on RADIOSS help on how to create contact surfaces and interfaces.
I had run the model which you had sent after creating the engine parameters but my simulation gives results like these
I am expecting results like these
I have given initial velocity of 1300 m/s in z axis but the bullet is not moving as expected .
I think my error will be on time definition on engine parameters.
Kindly guide me
check material properties and if you think time is a factor, increase the simulation in \RUN
if i increase the time in \RUN the solving time increases larger
I have tried with different time in \RUN the result is same but the solving time only increases .The bullet is not moving as expected
