Re: [Libmesh-users] Elasticity example - single element result drastically different from ABAQUS

[Yuxiang W. <yw...@vi...>]

Sorry that I just realized that I wasn't clear in the boundary conditions:

I fixed the MIN_X side of the model, and applied -Z traction on the surface
of MAX_X. The resultant displacement on the MAX_X surface is about -3e-3 in
ABAQUS, but only -2.2e-3 in the libmesh model. The other directions and the
magnitude of the displacement vector is also drastically different.

Shawn

On Tue, Dec 4, 2018 at 10:53 PM Yuxiang Wang <yw...@vi...> wrote:

> Dear all,
>
> Sorry to spam again.
>
> I was playing with ABAQUS & libmesh and noticed that the single element
> result for simple linear elasticity model is different. I know that there
> could be many factors that is leading to this (e.g. ABAQUS doing tricks
> that I am not aware of), but I'd really appreciate it if anyone could help
> provide some guesses on why this is the case, even for a simple
> single-element model. Thanks!
>
> Both models are 2x2x2 cubes (from -1 to +1 so the coordinate matches the
> bi-unit domain). I added a surface traction of -0.25 in the -Z direction,
> and observe the resultant displacements in Z. The ABAQUS model is attached
> (Job-1.inp), and the modified elasticity example is also attached. The
> resultant displacement, especially at the Z direction, is totally different:
>
>
> [image: image.png]
>
> Any tips would be much appreciated!
>
> Best,
> Shawn
> --
> Yuxiang "Shawn" Wang, PhD
> yw...@vi...
> +1 (434) 284-0836
>


-- 
Yuxiang "Shawn" Wang, PhD
yw...@vi...
+1 (434) 284-0836