Cantilever Beam Response Not Consistent With Analytical Solution

[HF123]

Hi users,

I am modelling a cantilever beam on Abaqus, and am investigating the deflection along the distance of the beam.
The following parameters are used: E (Pa)=1.41E+11, poisson ratio=0.314, b (m)=0.003125, t (m)=0.002, F (N)=0.007

I am trying to compare my data to the analytical solution that I calculated using Excel using the Bending Equation.

Unfortunitely, the shape of the two responses is very different, there seems to be an inconsistent result between the two, so I was wondering if you all know what has gone wrong with my model.

Really appreciate your help!
Herman

 

[FEA way]

It's hard to say without seeing the model. Perhaps the mesh is too coarse.

 

[GregLocock]

You seem to be missing one crucial dimension, 0.0225 perhaps.

Cheers

Greg Locock


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[BridgeSmith]

Does the Abaqus model have a fully fixed end condition?

Rod Smith, P.E., The artist formerly known as HotRod10

 

[SWComposites]

Post the details of your analytical calc.

 

[HF123]

Hi users,

Thank you for all of your replies, I have managed to resolve the issue!

Thank you again!
Herman

 

[Denial]

Having tweaked our interest, are you going to assuage it?

 

[BridgeSmith]

Yes, please let us know what the discrepancy was.

Rod Smith, P.E., The artist formerly known as HotRod10

 

[gb2835]

If I had to guess, because I ran into this as a student as well, OP was using Euler equations instead of Timoshenko. Just a thought!

 

[Denial]

But you shouldn't have to guess.
HF123 should have the courtesy to tell us.

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^{Engineering mathematician/analyst.[ ] See my profile for more details.}

 

[HF123]

Hi users,

Sorry for the late reply, I had a deadline to meet. I found that the issue was with the cantilever beam deflection equation that I used was the maximum deflection equation instead of the equation to calculate deflection at each point x. Also, there was a problem with the layup orientations on Abaqus, which I managed to find out how to define. So fixing these two issues led to a now consistent solution with each other.

Thank you again!
Herman