Beam Modelling
Beam Modelling
(OP)
Dear all,
I'm a little confused about the beam modelling when using Abaqus.
I'm trying to create a simple point load model on a cantilever beam. Initially i created it 2D model (or 1D?). Set up BC and apply load at free end. (see attached)
h ttp://file s.engineer ing.com/ge tfile.aspx ?folder=01 bdcbbf-02b 2-4e0b-8a7 3-1f42cf07 9861&f ile=2D.cae
I'm looking at end deflection height (mm) and comparing it to euler bernouli AND timoshenko. All of them do not seem to agree with each other. I was wondering what beam stiffness modelABAQUS uses. I've also done mesh study for convergence of result.
I'm then trying to simulate it using a 3D model. I tried using similar approach but the results are not agreeing. It seems i'm getting too much local deformation at the nodes where I apply the force. I've tied the nodes at the top edge as rigid node set and apply the force at the top edge at free end. Is there a better model to simulate the model of 2D(1D) as of above? The 3D model has not fully converged as computer cannot handle but it doesnt seem to converge near EB / timoshenko or the 1D model. Suggestions please.
h ttp://file s.engineer ing.com/ge tfile.aspx ?folder=4c f1eefd-3a6 3-47c6-888 d-b3a788f4 99d5&f ile=3D.cae
Much Appreciated.
W
I'm a little confused about the beam modelling when using Abaqus.
I'm trying to create a simple point load model on a cantilever beam. Initially i created it 2D model (or 1D?). Set up BC and apply load at free end. (see attached)
h
I'm looking at end deflection height (mm) and comparing it to euler bernouli AND timoshenko. All of them do not seem to agree with each other. I was wondering what beam stiffness modelABAQUS uses. I've also done mesh study for convergence of result.
I'm then trying to simulate it using a 3D model. I tried using similar approach but the results are not agreeing. It seems i'm getting too much local deformation at the nodes where I apply the force. I've tied the nodes at the top edge as rigid node set and apply the force at the top edge at free end. Is there a better model to simulate the model of 2D(1D) as of above? The 3D model has not fully converged as computer cannot handle but it doesnt seem to converge near EB / timoshenko or the 1D model. Suggestions please.
h
Much Appreciated.
W





RE: Beam Modelling
RE: Beam Modelling
end load: 2000N, L=200mm, h=20mm, w=25mm, E=209E3 N/mm, v=0.3,
Abaqus: ~ -1.543
Euler-B: PL^3 / 3EI = -1.531
Timoshenko: EB + PLh^2 / 2GI = -1.591
EB < Abaqus < Timo
I thought Abaqus uses one of them and should therefore be much closer / the same.
any explainations to that?
RE: Beam Modelling