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I am carrying out a linear static loading of helical spring, which is interfaced between two plates and have defined slide contact between the spring and the plates. Upon applying the load to the top plate i obtained the spcf forces on the bottom plate nodes. However, I am obtaining unexpectedly high loads at the contacts (100 times higher than the loading force~1000). Am i doing something wrong in setting up the contacts?

I am attaching pictures of result, setup and contact surfaces for clarity

run1 forces.jpg

Sketch.png

contact.png

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Hi Rahul,

 

Sorry for a late reply.

 

Why did you choose to run Linear static with contacts? 

Linear static with non linear contacts may not provide right results. 

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@Prakash Pagadala 

 

While carrying out the non linear analysis I am unable to obtain a force balance (between contact force and reaction force) on the plates.  I tried defining different conditions of contact (slide and stick) however in both the cases  i am unable to obtain a force balance. Something seems to be wrong.

 

I can transfer the file if needed.

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Hi Rahul,

 

I think we are confusing each other :) 

 

Contact force is a measure of force to prevent penetration. 

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Hi prakash,

 

Hope you doing well

Here i am need reaction force at constrained location but i unable to get the force it showing zero i defined all the parameters. Can you please check the model once for me .

And please give feedback. Thanks for your time. i have attached the model as shown below.

 

 

MOUNT_PART_MODEL.fem

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hi Prakash,

 

Hope you doing well. i am trying to do analysis on enforced displacement with friction contact between the contacts. but the top component is penetrating i have changed the parameters but i unable to get the solution. Please take a look once to the file.

 

thanks for you support.

 

 

TEETH_PLATE_ANALYSIS.fem

picture.PNG

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I have tried a static analysis in Optistrct and i m facing two issues. 

 

1) image.png.a50cd7d99caccced79f40bd14c380f21.png

 

 

2) Contact is not working in Quasi static also. Could you please help me out

image.png.6ba508953270edb1bb3ec7fd40fc1cef.png

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Hi,

 

I see the load is applied to a point/node and not distributed to an entire top surface of load component, is that correct?

 

 

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Actually i have created a load bar that is connected with the RBE2 elements. So i have applied the load at the RBE2 element so that the load will be distributed through the load bar part.The things is the contact between the Load bar and part is working and the contact between the bottom support and the part is not working.

 

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OK, I will update and check the run.

 

meanwhile what about units?

 

I see element size in the order of 0.3 and height of the component is 15 approx... 

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