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Fixed Beam Deflection

Posted 14 mars 2014, 11:04 UTC−4 Structural Mechanics Version 4.4 4 Replies

Georgios Drakopoulos
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Hi,
I have a circular beam fixed at both ends using "Beam" physics and "Stationary" study. By applying an edge load on the beam I would expect to observe a deflection of the beam. In contrast only the loaded edge of the beam is deflected. It behaves like the beam is not one united material. What could be wrong?

I would be grateful for some help.
4 Replies Last Post 24 mars 2014, 10:45 UTC−4
Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago 14 mars 2014, 17:04 UTC−4
If you post your COMSOL model maybe someone from the Forum can take a look and find the problem.
If you post your COMSOL model maybe someone from the Forum can take a look and find the problem.
Georgios Drakopoulos
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Posted: 1 decade ago 16 mars 2014, 16:27 UTC−4
I attach the model if someone could help.
Thanks,
Georgios
I attach the model if someone could help. Thanks, Georgios

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Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago 17 mars 2014, 22:49 UTC−4
Hi,

You are modeling the beam incorrectly. What you have are four straight beams spanning the length and four curved beams at the end. With beams you should only model one “edge” and not explicitly model the circular cross-section. Check the COMSOL documentation for examples and details on using Beams.

Nagi Elabbasi
Veryst Engineering
Hi, You are modeling the beam incorrectly. What you have are four straight beams spanning the length and four curved beams at the end. With beams you should only model one “edge” and not explicitly model the circular cross-section. Check the COMSOL documentation for examples and details on using Beams. Nagi Elabbasi Veryst Engineering
Georgios Drakopoulos
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Posted: 1 decade ago 24 mars 2014, 10:45 UTC−4
Thanks for the answer.

I would like to make a composite beam: a circular cross section and above that a cylinder of different material. But if I model only one edge how could I assign the two different materials?

Kindly,
Georgios
Thanks for the answer. I would like to make a composite beam: a circular cross section and above that a cylinder of different material. But if I model only one edge how could I assign the two different materials? Kindly, Georgios

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