When we start trying to screw the bolt the two contact points slide a little bit until you can start making high pressures. Then the level arm of the bolt will start rotating until it’s totally vertical. Then when we continue applying force the flat spanner’s head will open and reach an aperture which it cannot longer screw and it would jump from side to side of the bolt or the other case is that it will simply break.
I've modelled the flat spanner in ansys and assumed that when a person uses the flat spanner is making a constant pressure along the contact surface between the hand and the wrench.
I have also decided to fix the displacements of two nodes of the spanner’s mouth. The first one is on the top left and the other on the bottom right. The top left point we only restricted it by the Y axis, because when the wrench will be turning, in reality first it'll slide and the flat spanner will deform and have some displacement.
This last boundary condition is not accurate with reality so I wanted to try by modelling the hexagonal bolt and fix it in the middle and try to see the interaction between the models and if the flat spanner will break (plot stresses). Unfortunately I'm not habituated with ANSYS so I need some help to define the different materials of the flat spanner and the bolt in the same project, fix the middle of the bolt, apply the pressure and that the flat spanner isn't underconstrained or if it's possible to do such thing, thanks.
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