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full model of a coil spring?

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Hello,
I'd like to model a coil spring, to include changes in diameter due to compression, and longitudinal and torsional modes. Is this a reasonable task for Comsol, or would it be prohibitively complex?

Perhaps it's already been done and there are sample models?

Thanks!

-Andy

3 Replies Last Post 2014年3月18日 GMT-4 22:31
Nagi Elabbasi Facebook Reality Labs

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Posted: 1 decade ago 2014年3月18日 GMT-4 14:48
Hi Andrew,

It’s a reasonable task in my opinion. Select physically accurate boundary conditions depending on whether the ends of the coil are allowed to rotate or twist. Also if you compress the spring enough then account for contact.

Nagi Elabbasi
Veryst Engineering
Hi Andrew, It’s a reasonable task in my opinion. Select physically accurate boundary conditions depending on whether the ends of the coil are allowed to rotate or twist. Also if you compress the spring enough then account for contact. Nagi Elabbasi Veryst Engineering

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Posted: 1 decade ago 2014年3月18日 GMT-4 15:07
Thanks Nagi.
I presume I would need a moving mesh, since the displacement is greater than the width of one of the helicies?
My force input is from a speaker coil attached to one end of the spring, which would exert force only in the axial direction.
Thanks again,
Andy
Thanks Nagi. I presume I would need a moving mesh, since the displacement is greater than the width of one of the helicies? My force input is from a speaker coil attached to one end of the spring, which would exert force only in the axial direction. Thanks again, Andy

Nagi Elabbasi Facebook Reality Labs

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Posted: 1 decade ago 2014年3月18日 GMT-4 22:31
Hi Andy,

No need for a moving mesh. COMSOL uses a Lagrangian framework for structural problems so if the deformations are large the mesh will move “automatically”.

Nagi Elabbasi
Veryst Engineering
Hi Andy, No need for a moving mesh. COMSOL uses a Lagrangian framework for structural problems so if the deformations are large the mesh will move “automatically”. Nagi Elabbasi Veryst Engineering

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