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#1 2022-05-05 13:47:05

chhavikusum
Member
Registered: 2021-11-11
Posts: 3

Best method to apply force

Hi all, I have a load of some 1600N to be applied on a circular area, like in the attachment. What would be the best way to apply it? I have used Force_nodale but want to make sure that is the correct way.
also attaching the comm file.

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#2 2022-05-05 15:38:25

mf
Member
Registered: 2019-06-18
Posts: 324

Re: Best method to apply force

Hello,

measure the area, divide your 1600N by that area and apply this value as FORCE_FACE (=1600/area). Mind your units, they must be consistent.

Repost your attachent please, it got lost,

Mario.

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#3 2022-05-06 04:22:30

chhavikusum
Member
Registered: 2021-11-11
Posts: 3

Re: Best method to apply force

Thank you Mario, can you also please help me understand what force application method is what? I went through the documentation and other references too but still find myself confused.

Thanks
Chhavi

I am reattaching. Hopefully they stay this time smile


Attachments:
loading.JPG, Size: 17.92 KiB, Downloads: 47

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#4 2022-05-06 04:23:44

chhavikusum
Member
Registered: 2021-11-11
Posts: 3

Re: Best method to apply force

Comm file


Attachments:
RunCase_3_Stage_1.comm, Size: 1.88 KiB, Downloads: 39

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#5 2022-05-06 06:34:29

miib
Member
From: La Capanna Dello Zio Tom
Registered: 2021-03-23
Posts: 198

Re: Best method to apply force

principle:
on lines, areas and volumes you apply distributed and non-concentrated loads
on points (nodes) you apply concentrated loads

right?

:-)


I ever used code_aster for study.
Code_Aster ??? is the Novacula Occami of the FEM world.
“Non è bene cercare di fermare il progresso della conoscenza. L'ignoranza non è mai meglio della conoscenza.” Enrico Fermi.

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#6 2022-05-06 09:55:13

jonas loenartz
Member
Registered: 2021-10-01
Posts: 51

Re: Best method to apply force

I personally would always prefer distributed load-definitions like FORCE_FACE or FORCE_COQUE, etc. compared to FORCE_NODALE. FORCE_NODALE applies a constant force to every referenced node. So if your mesh is more refined in some areas, the load concentrates on these areas. The other load-definitions distribute the load onto the nodes by area.

In most cases this effect should be small, but I think it is good practice.

Jonas

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