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October 6, 2023 at 11:54 am
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October 6, 2023 at 12:04 pm
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October 6, 2023 at 12:17 pm
Noura Mansour
Subscriberyes
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October 6, 2023 at 12:06 pm
Noura Mansour
Subscriberyes the large deformation was on
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October 6, 2023 at 1:34 pm
Akshay Maniyar
Ansys EmployeeHi Noura,
Can you try increasing the deformation of the spring and see if it shows nonlinear behavior? Also, I don't see any contact added in your simulation. Any specific reason you have not added contact?
Thanks,
Akshay Maniyar
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October 6, 2023 at 1:58 pm
Noura Mansour
SubscriberCan you tell me how i add contact ?
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October 6, 2023 at 2:12 pm
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October 6, 2023 at 2:26 pm
Erik Kostson
Ansys EmployeeHi
We also have a course in contacts that can be of help.
/courses/index.php/courses/contact-mechanics/
All the best
Erik
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October 6, 2023 at 4:37 pm
Noura Mansour
Subscriber? ( linearity)
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October 6, 2023 at 4:43 pm
Erik Kostson
Ansys EmployeeHi
Please describe more what you want to say – what do you mean with “? linearity”?
If you want help then explain in detail what you mean and want help with otherwise we can not provice any feedback.
Thank youErik
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October 6, 2023 at 4:44 pm
Noura Mansour
SubscriberSorry i mean what do you think about this problem (linearity)?
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October 6, 2023 at 4:48 pm
Erik Kostson
Ansys EmployeeHi
Not sure - the important thing is to understand where the nonlinear stiffness comes from in reality in such a spring?To add, when the coils make contact with each other as the compression increases, the stiffness should change I would imagine.
Hope this helps.
Erik -
October 9, 2023 at 6:40 am
Akshay Maniyar
Ansys EmployeeHi Noura,
Yes, I agree with Erik. The only non-linearity which is missing is the frictional contact of coils. Also, large deflection is ON so the solver is considering the geometric non-linearity. Please try adding contact and see if it helps.
Thanks,
Akshay Maniyar
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October 9, 2023 at 9:50 am
Noura Mansour
SubscriberFrictional contact of all geomtry ?
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October 9, 2023 at 10:33 am
Akshay Maniyar
Ansys EmployeeYes, you can use frictional or frictionless contact.
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