Torque/Moment load application

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Moderatoren: ccad, mz15, auroraIco, Lehrstuhl

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peterpoon
Newbie
Beiträge: 3
Registriert: Fr 1. Jun 2012, 14:48

Torque/Moment load application

Beitrag von peterpoon »

Hello,

I am learning to use you the Z88 software and I am wondering if it is possible to implement a torque/moment load on nodes as a loadcase. I don't find this possibility in the list.

Thank you

hanne12
Import
Beiträge: 21
Registriert: Di 21. Sep 2010, 09:16

Re: Torque/Moment load application

Beitrag von hanne12 »

Hello Peter,

generally you can setup 6 degrees of freedom per Node:
1 linear X-axis
2 linear Y-axis
3 linear Z-axis
4 rotation X-axis
5 rotation Y-axis
6 rotation Z-axis

For each degree you can adjust:

1 force/moment
2 displacement/rotation degree

Some example:
8 1 1 21870 # Node8 X-axis(linear) Force Value21870
9 4 2 0 # Node9 X-axis(rotation) locked
10 5 1 1000 #Node10 introduce Y-axis moment of 1000 (no unit)

In each case you have to be sure, that your element handle moments.

Best greetings,

Hanne12

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mz15
Site Admin
Beiträge: 264
Registriert: Do 5. Aug 2010, 19:23

Re: Torque/Moment load application

Beitrag von mz15 »

Hello Peter,
hanne12 hat geschrieben: In each case you have to be sure, that your element handle moments.
hanne12 is absolutely right. Currently, only the structural elements can handle moments. Radial boundary conditions for 3D-elements are not available.

Best greetings,
Markus Zimmermann

peterpoon
Newbie
Beiträge: 3
Registriert: Fr 1. Jun 2012, 14:48

Re: Torque/Moment load application

Beitrag von peterpoon »

Thank you for your responses.

Do you have an idea if it will be available for 3D Elements in the next version of the software ?

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auroraIco
Site Admin
Beiträge: 153
Registriert: Di 24. Aug 2010, 12:49

Re: Torque/Moment load application

Beitrag von auroraIco »

This is not a question of Versions. 3D elements like tetrahedron only have 3 degrees of freedom. For boundary conditions you have to convert moments in forces via lever arm.

Greetings aurora_ico

peterpoon
Newbie
Beiträge: 3
Registriert: Fr 1. Jun 2012, 14:48

Re: Torque/Moment load application

Beitrag von peterpoon »

Thank you,

Is there 3D element available in Z88 that could manage 6dof loads ? If not, is it existing ?

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MNeidnicht
Alumni
Beiträge: 47
Registriert: Do 2. Sep 2010, 16:01

Re: Torque/Moment load application

Beitrag von MNeidnicht »

Hi peterpoon,

no, there is no volume-element with 6dof. Neither z88, or in other fea-tools. At least I've never seen. As auroraico said: There is no need to use torques in volume-elements, because they must change their shape to accommodate a bend. And this change can be sufficiently described with three coordinates.

Kind regards.
Martin Neidnicht

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