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Abaqus FEA Problem - Displacing an Entire Part at Once
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[QUOTE="jrmichler, post: 5922637, member: 638574"] I had similar problems when using ABAQUS to model sheet metal forming. I was modelling the process of pulling a strip of sheet metal through a test machine. I started by defining a velocity for the end nodes of the modeled strip. That blew up right away. The root problem is that, in FEA land, the part being modeled has exactly zero damping between each and every node. I pulled the end nodes a distance of (velocity X time step), which created a large strain (and stress) in the end elements after the first time step. At the second time step, the second row of nodes jumped forward because of the high stress, and the whole process went into positive feedback. I ended up pulling the strip through a spring and dashpot to make the model work. Take hard look at your material density, element sizes, velocity, and time step size. You could be inadvertently hitting the end of your tube at high velocity before the rest of your part has a chance to move. [/QUOTE]
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Abaqus FEA Problem - Displacing an Entire Part at Once
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