Definition for a Nastran ROD element

• Aug 17, 2006

• #2

johnhors

Aerospace

Jan 21, 2004

1,021

GB

"I don't have access to this information"

Why not? Nastran installations come with documentation!

 

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• Aug 17, 2006

• Thread starter
• #3

sjbjcl

Aerospace

Oct 3, 2005

16

US

johnhors,

Thanks for your reply. I don't have a copy of Nastran. I am reviewing a FEA report that someone else prepared and I thought that someone here could help.

sjbjcl

 

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• Aug 17, 2006

• #4

dmacx

Mechanical

Jun 27, 2005

64

TR

The rod is a simple truss type element that has axial and torsional stiffness. If you think of a truss where each member is pinned at its end, the rod element would be ideal. Do you need the stiffness matrix formulation?

 

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• Aug 18, 2006

• Thread starter
• #5

sjbjcl

Aerospace

Oct 3, 2005

16

US

Hi dmacx,

I really appreciate your response. This information is very helpfull. It sounds like it is similar to a pinned beam. Is it capable of carrying any transverse forces and bending? I think that something that explains the general properties and fixities would be helpful.

Thanks,
sjbjcl

 

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• Aug 21, 2006

• #6

Spirit

New member

Oct 29, 2001

93

IT

sjbjcl,

CRODs do not carry or transmit shear/bending forces by definition: only axial tension/compression.


Regards


'Ability is 10% inspiration and 90% perspiration.'

 

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• Aug 21, 2006

• Thread starter
• #7

sjbjcl

Aerospace

Oct 3, 2005

16

US

Hi Spirit,

Thanks for the explanation. Interesting choice of element. In their analysis they used three rod elements at each attachment point to isolate the reaction loads. I supposed that using this type of element on an interior monument would make sense. That way you can be sure that the monument is not affected by the rod element.

Thanks for all your help guys.

sjbjcl

 

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