Three point test with pendulum strike

[Mike Winifred]

Hi all,pendHit.JPG
         Am trying to recreate an experimental setup. Which is a 3  pt bending setup(plz see the attached picture) where a rigid impactor which is attached to the one end of a rigid pendulum rod and the other end is pivoted. I have made the whole model but now the problem is how to simulate the swinging action of the pendulum? and whether the model can be simplified further by modeling only the impactor and by somehow simulating the swinging of the impactor? ... Can some one give em few tips on this? thanks.

Mike

[Musabbir Abdul Majeed]

Hi,
I need to rush back to work. But, I will try to explain briefly. Try defining your velocity of pendulumn using pre-defined field in ABAQUS. Make sure you select initial step to define velocity.
If you are using explicit analysis, then define normal contact and make sure you check the option similar to rebound after impact and that should do.
Hope i am not talking rubbish. If i am then please correct me, so, I will learn as well.

Best Regards,Musabbir

To: ABAQUS@...
From: mike_msmin@...
Date: Sun, 1 Nov 2009 21:52:35 -0800
Subject: [ABAQUS] Three point test with pendulum strike















 




   
                 

Hi all, http://old.nabble.com/file/p26156031/pendHit.JPG pendHit.JPG

         Am trying to recreate an experimental setup. Which is a 3  pt

bending setup(plz see the attached picture) where a rigid impactor which is

attached to the one end of a rigid pendulum rod and the other end is

pivoted. I have made the whole model but now the problem is how to simulate

the swinging action of the pendulum? and whether the model can be simplified

further by modeling only the impactor and by somehow simulating the swinging

of the impactor? ... Can some one give em few tips on this? thanks.



Mike

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[Mike Winifred]

Yea but the problem is the moment of inertia .... when i model the rigid
pendulum impactor i should give the moment of inertia for the model .... is
there a way where abaqus can automatically calculate the moment of inertia
for the impactor?



Mike Winifred wrote:

>
> Hi all, http://old.nabble.com/file/p26156031/pendHit.JPG pendHit.JPG
>          Am trying to recreate an experimental setup. Which is a 3  pt
> bending setup(plz see the attached picture) where a rigid impactor which
> is attached to the one end of a rigid pendulum rod and the other end is
> pivoted. I have made the whole model but now the problem is how to
> simulate the swinging action of the pendulum? and whether the model can be
> simplified further by modeling only the impactor and by somehow simulating
> the swinging of the impactor? ... Can some one give em few tips on this?
> thanks.
>
> Mike
>

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View this message in context: http://old.nabble.com/Three-point-test-with-pendulum-strike-tp26156031p26159974.html
Sent from the Abaqus Users mailing list archive at Nabble.com.

[Mike Winifred]

Yea but the problem is the moment of inertia .... when i model the rigid pendulum impactor i should give the moment of inertia for the model .... is there a way where abaqus can automatically calculate the moment of inertia for the impactor?

Mike Winifred wrote:

Hi all,pendHit.JPG
         Am trying to recreate an experimental setup. Which is a 3  pt bending setup(plz see the attached picture) where a rigid impactor which is attached to the one end of a rigid pendulum rod and the other end is pivoted. I have made the whole model but now the problem is how to simulate the swinging action of the pendulum? and whether the model can be simplified further by modeling only the impactor and by somehow simulating the swinging of the impactor? ... Can some one give em few tips on this? thanks.

Mike

[Musabbir Abdul Majeed]

Abaqus can not calculate moment of inertia automatically. But, you can e.g. constraint the rotational degrees of freedom of impactor in the initial step. Then, you will not need to enter moment of inertia.
As far as I can see you want the impactor (hammer) to rotate about a point a hit the specimen, you can assign a rotational velocity to the impactor.
Hope this helps.
Best Regards,Musabbir

To: ABAQUS@...
From: mike_msmin@...
Date: Mon, 2 Nov 2009 21:41:22 -0800
Subject: Re: [ABAQUS] Three point test with pendulum strike















 




   
                 

Yea but the problem is the moment of inertia .... when i model the rigid

pendulum impactor i should give the moment of inertia for the model .... is

there a way where abaqus can automatically calculate the moment of inertia

for the impactor?



Mike Winifred wrote:

>

> Hi all, http://old.nabble.com/file/p26156031/pendHit.JPG pendHit.JPG

>          Am trying to recreate an experimental setup. Which is a 3  pt

> bending setup(plz see the attached picture) where a rigid impactor which

> is attached to the one end of a rigid pendulum rod and the other end is

> pivoted. I have made the whole model but now the problem is how to

> simulate the swinging action of the pendulum? and whether the model can be

> simplified further by modeling only the impactor and by somehow simulating

> the swinging of the impactor? ... Can some one give em few tips on this?

> thanks.

>

> Mike

>



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