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Weird Forceless Elongation

Question asked by Andrew Lutz on Oct 19, 2018
Latest reply on Oct 25, 2018 by Andrew Lutz

My simulation is 2D and consists of a thin walled envelope with pressure applied to the internal walls.  At the bottom left a semicircle is fixed in space. Outside of the envelope there is no other force.  I added a long straight member just for visualization.  The funny thing is, this long straight member appears to become longer in the simulation results.  Not only this, but the rest of the part seems to grow or swell in the material's thickness.  The results show zero stress or strain in the long straight member, which is correct.  The displacement values calculated are way too larger to be physically possible (The max. displacement in the results is much longer than if the part was fully stretched straight).  Has anyone seen something like this before?


Message was edited by: Andrew Lutz Added attachement with .sldprt file.