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Folding or bending of steel full bar

DenisJaunin
15-Moonstone

Folding or bending of steel full bar

Hello

How is it possible to simulate the force required to bend this

steel bar under the terms of the attached drawing.

You must enter the information of the steel to exceed the elastic limit.

Simulate 3.0 is it able to do

Kind regards.

Denis

17 REPLIES 17

Hello,

creo 2 m080 is very good:

Regards

Paul

Hello Paul,

Thank you for this video.

But the bar does not slide, it remains fixed in the wall.

It's just the part B - C which must bend turn to point B.

And the question is how much force should be applied to achieve this result?

Kind regards.

Denis.

Hi,

question:

bending.JPG

You can use measures

Regards

Paul

Hello

No, because at the moment the question is moot.

Kind regards.

Denis

Denis,

it is not trivial, in simulate

bending.PNG

Not possible in simulate because plastic collapse.

Regards

Paul

Denis,

    Maybe you can have a try by following these steps:

    First,you should know the vertical distance between point C and point C' when the bar bends down;

    Then set a forced displacement(prescribed translation) which equals that distance;

    The third,make a force measure of the forced displacement,hope these can help you!

   

The Problem is the plastic collapse, for exmaple:

plastic_collapse.jpg

Regards

Paul

Hello Paul,

Thanks for this example.

You mean the plasticization of beams in soul full in flexion.

Simulate can't go this far in the calculations.

Kind regards.

Denis.

http://www.e-periodica.ch/cntmng?pid=bse-cr-001:1952:4::19

"Simulate can't go this far in the calculations"

yes (no global collapse).

Regards

Paul

Hello

Attached is a model

Kind regards.

Denis

Necking of an Elastoplastic Metal Bar

L01JO)51O%DD~[~OSST}{KL.pngL[`}~6EI~YAPV}LADRA2SF8.png

4RTP5BHFRU3EPS$AJRO7)VM.png

The size of the force is 245N

you can use optimized design studies

DenisJaunin
15-Moonstone
(To:学蒋)

Hello  学 蒋

Thank you for your response.

The blockages on the axis you do on "points"?

You have used the method of optimized design studies?

Kind regards.

Denis

"blockages " means constraint?

GOE_L765DNK}I%4ITSAL3AI.png

I used the optimized design

The beam.prt.1 can be opened by creo 4.0


DenisJaunin
15-Moonstone
(To:学蒋)

Hello

Thank you for your shipment.

Yes, blocking means forced.

I'm on W7 32-bit pro, I do not yet use Creo 4.0, so that I

buy a PC 64 bit with W10 pro.

Kind regards.

Denis.

DenisJaunin
15-Moonstone
(To:学蒋)

Hello

Here's another demo done with 64-bit software.

Kind regards.

Denis.

http://cds.comsol.com/mg/c585a2fffbe78e.zip

Yes, Denis, it is possible to analyze this, but you will have to use solid elements with material plasticity, and also large deformation analysis + contact analysis. If you want to model the plastic collapse, you cannot model the load using a "load", instead, you will need to model the load using an enforced displacement.

The nonlinear solver is sensitive to mesh, I advise to use brick/wedge elements to model the beam.

Here are a few pictures from a plastic collapse analysis I did a few years ago. I recall that I also had an animation, but I can't seem to find it. Unfortunately I can't run Creo where I sit now, so I can't re-create these results.

In this case I have no contacts, but the load is axial, and what you see here is post-critical behavior, if you enforce a vertical displecement, along the edge of the beam end.

/Mats L/

plastic_collapse2.JPG

plastic_collapse1.JPG

Hello masts,

Thank you for your response and your explanations.

I put the demonstration in GIF, because the link is no longer valid.

Kind regards.

Denis

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