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03-27-2017 03:40 AM

Hi,

Whats an easy way to apply loads (Fx,y,z & Mx,y,z) to the CG of a 2D (surface) cross section, then obtain the stress values at each corners (left/right/top/bottom) of that cross section (stress checkpoints)?

Thanks,

Aero1

7 REPLIES

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03-27-2017 12:08 PM

Dear Aero1,

If you model your problem using 1-D line CBAR/CBEAM elements mesh your beam elements in the CoG of the cross section and you are done: you can request to have stresses automatically at the four stress recovery points. You can select manually the location of the four stress recovery points. Use the shape "**General Section**", this way you can select the cross section surface.

But I understant that you have meshed your component with 3-D solid elements and in the cross section you have located the CoG: then put a grid there and use an RBE3 element to distribute your loads in the cross section. In the DOF of the dependent node activate ALL DOF.

Best regards,

Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director

IBERISA • 48004 BILBAO (SPAIN)

WEB: http://www.iberisa.com

Blog Femap-NX Nastran: http://iberisa.wordpress.com/

IBERISA • 48004 BILBAO (SPAIN)

WEB: http://www.iberisa.com

Blog Femap-NX Nastran: http://iberisa.wordpress.com/

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03-28-2017 03:08 PM - edited 03-28-2017 06:05 PM

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04-02-2017 08:10 AM

Dear Aero1,

Your question about "**contraints**" let me confused, better post the full model to have a clear idea of what you need, OK?.

Best regards,

Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director

IBERISA • 48004 BILBAO (SPAIN)

WEB: http://www.iberisa.com

Blog Femap-NX Nastran: http://iberisa.wordpress.com/

IBERISA • 48004 BILBAO (SPAIN)

WEB: http://www.iberisa.com

Blog Femap-NX Nastran: http://iberisa.wordpress.com/

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04-04-2017 01:29 AM

Hi Blas,

Thanks for your reply, here is a simple cross section I made, simply I would like to apply loads and moments to the CG of this cross section and then study the stress values at the stress recovery points.

Thanks,

Aero1

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04-06-2017 12:15 PM

Hi Blas,

So basically, I would like to know if it is possible to study the load distribution (from any point in that plane, CG, Shear center,...) on any 2D cross section or not?

Thanks,

Aero1

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04-07-2017 05:55 PM

Dear Aero1,

Take a look to my post in the blog, there you have methods to distribute remote loads using RBE2 & RBE3 elements:

https://iberisa.wordpress.com/2015/10/13/rbe2-vs-r

Best regards,

Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director

IBERISA • 48004 BILBAO (SPAIN)

WEB: http://www.iberisa.com

Blog Femap-NX Nastran: http://iberisa.wordpress.com/

IBERISA • 48004 BILBAO (SPAIN)

WEB: http://www.iberisa.com

Blog Femap-NX Nastran: http://iberisa.wordpress.com/

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04-08-2017 02:03 AM

Perfect!, thank you.

Aero1

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