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About Fixed constraint

Posted 11 giu 2013, 07:41 GMT-4 Materials, Structural Mechanics Version 4.1, Version 4.2, Version 4.2a, Version 5.0 3 Replies

uday
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Hi,
i have applied fixed constraint (in SM module) at one end of the plate. that is the displacements are zero in all (X,Y,Z)direction. What about rotation? rotation also zero in three direction?

can you explain me
please...
3 Replies Last Post 2 feb 2017, 17:31 GMT-5
Henrik Sönnerlind COMSOL Employee

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Posted: 1 decade ago 12 giu 2013, 04:54 GMT-4
Hi,

In a Beam, Shell, or Plate interface, the Fixed condition means that all translations and rotations are zero. In the physics interface having only translational degrees of freedom it means constraining all translations.

Regards,
Henrik
Hi, In a Beam, Shell, or Plate interface, the Fixed condition means that all translations and rotations are zero. In the physics interface having only translational degrees of freedom it means constraining all translations. Regards, Henrik
Jazmin Espinoza
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Posted: 8 years ago 21 dic 2016, 17:51 GMT-5
but if the problem is a 3D problem like a solid, the rotations with fixed constraint are also equal to zero? in the case that are not zero, which constraint or condition I have to use for that the rotations are equal zero?

excuse my english
but if the problem is a 3D problem like a solid, the rotations with fixed constraint are also equal to zero? in the case that are not zero, which constraint or condition I have to use for that the rotations are equal zero? excuse my english
Jeff Hiller COMSOL Employee

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Posted: 8 years ago 2 feb 2017, 17:31 GMT-5
In a 3D solid analysis, there is no degree of freedom associated with a point's rotations, only its translations. Therefore you cannot directly constrain the rotation of individual points.
Jeff
In a 3D solid analysis, there is no degree of freedom associated with a point's rotations, only its translations. Therefore you cannot directly constrain the rotation of individual points. Jeff

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