2010/4/18 Václav Šmilauer <[email protected]> > > > Should not we also have a normal applied force once we test shear? > Maybe I got your question right now. The Cpm model is cohesive, plastic > limit is non-zero for zero normal force; there can be shear without > normal force then. v > > Hi Vaclav, in fact I am not yet dealing with cohesive laws. Actually if one wants to test the shear direction it is not as straightforward as for the normal part. I managed to do that having viscous damping at contacts (so that, in a sphere-sphere interaction, you first apply a force in the normal direction till you reach equilibrium having a damped solution and then you apply the shear force and look at the problem as it is in the normal direction, the incremental formulation eventually being the only difference). But if I take another law, say the Mindlin one, I do not know how to repeat the test not having damping for normal/shear direction. If you have any suggestions in mind just let me know. Say that I just want to plot the force/displacement relationship in the shear direction. Cheers, Chiara
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