ramp load

[holmesss]

Hello,

I have a very simple assembly containing a cube and a sphere.
The two models do not touch in the beginning,they are 1 unit(or 1 cm) far from each other.
I want that the cube be fixed , and then apply a force and a motion in one direction(like the x axis) on the sphere that will increase gradually (Ramp load if possible) as soon as it touches the fixed cube.The simulation would stop after the load reaches 300N on the sphere.

Is there a way to do that on FEMAP ?

Thanks a lot !

 

[rb1957]

put a gap/contact element between the two bodies.

why start 1cm apart ? even if the initial conditions are important to you, you can determine them from Newton's Laws ? else, start with the bodies in contact. do you want the bodies to deform ?

is this real work (seems very simple but you could be modeling something complicated as something simple) ?
or a student project ?

another day in paradise, or is paradise one day closer ?

 

[holmesss]

yes it's a student project and I'm quite new to femap.
So I've tried to put the two bodies in contact , then I used a connector and chose "contact" instead of "glued".
and I put loads on the ball and constraints on the cube.

The analysis failed and showed fatal errors.

Note that I am using parasolid files coming from Stl files. Is that problematic ?
How can I define a motion on the ball ?

Do i really want the bodies to deform ? Yes , I want to see the displacement of the nodes of the cube(that is fixed by its lower face only) and would like to see the stress and strain in the cube when the force delivered by the ball moves from 0N to 300N .

Is that difficult to do ?

 

[rb1957]

sorry, no student posting allowed ... try "engineering.com"

another day in paradise, or is paradise one day closer ?