Applying pressure on deformed surfaces

[hussas]

I have some problems in applying pressure on a suction cup model. I am beginner in Ansys and working on Ansys Workbench

<UL TYPE=SQUARE> I have one atmospheirc pressure acting on the outside of suction cup and from inside it is 0.1 unit below atmospheric pressure.

The effective force is the difference between the presuure on outside and inside time the effective area.

In order to apply the pressure on both the side in Ansys Workbecnh I select inner and outer face and apply the pressure mentioned above.

This diffenrce in pressure deform the suction cup and some part of the suction cup come in contact with the ground sp the effective area is reduced.
How should i now apply the force on the inside of the suction cup that only acts on the face not on the part which is coming in contact with the ground? [/list]

Any help will be much appreciated

Thanks

Hussain

[hussas]

I have some problems in applying pressure on a suction cup model. I am beginner in Ansys and working on Ansys Workbench

<UL TYPE=SQUARE> I have one atmospheirc pressure acting on the outside of suction cup and from inside it is 0.1 unit below atmospheric pressure.

The effective force is the difference between the presuure on outside and inside time the effective area.

In order to apply the pressure on both the side in Ansys Workbecnh I select inner and outer face and apply the pressure mentioned above.

This diffenrce in pressure deform the suction cup and some part of the suction cup come in contact with the ground sp the effective area is reduced.
How should i now apply the force on the inside of the suction cup that only acts on the face not on the part which is coming in contact with the ground? [/list]

Any help will be much appreciated

Thanks

Hussain

[Adambomb]

Why is it I get the feeling this is a homework problem?

If this is a "real world" problem, my suggestion would be to skip an Ansys, take your suction cup, stick it to whatever you want to stick it to, take one of those amazing digital fish-weighing scales you can get from Harbor Freight for $18, enable the "max" function, and then pull the suction cup off the wall.

[Drew Price]

Sounds like you need some iterations to me, since you need to find the steady-state solution, since final conditions =/= initial conditions.

[Demon Of Speed]

Check your fluids book. I remember doing this stuff by hand in Fluids 1.

[Tim.Wright]

I find a bolted joint is usually stronger and stiffer than a suction cup. Especially for engine and suspension mounts.

Tim

[hussas]

Thanks all for your reply.

I am working on wall climbing robot using suction cups. Although its a basic problem but I need to solve it to develop my Ansys Workbench problem. I know to do it mathematically by using theroy of elasticity.

Could anyone have any idea how to solve such sort of problem?

Any help will be appriciated

Reagrds