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Topic Date User

impulse force on cams 14-Sep-2005 At 10:20:53 PM changie

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Great! you picked a very interesting subject. You'll find the stresses will change as you vary the restraint conditions. In reality the rock has a Young's modulus "E" which is sometimes modeled as a bunch of spring constants - your program may let you do that. I'd avoid the fixing rotation (can't see that happening - ever).

Note to that when the load comes on the cam, apart from "camming", will slip, unless it's jammed up against a surface. This will be difficult to model

Another couple of aspects which you should be able to model are
. a "high" spot (eg a Buffalo quartz crystal). FEA should give you stress intensities - localized yielding of the metal.
. lateral load, say at the tip of the one of the cams. Beware the type of finite element you use - some assume a zero out-of-plane stress.

When cams are tested to destruction, do you know what the failure mode is?

Changie