Washer as load bearing element (analysis)
Washer as load bearing element (analysis)
(OP)
I'm having some difficulty approaching the stress analysis of a washer with a load applied uniformly over 360 degrees.
The setup is a washer held against the end of a 24mm shaft via a standard machine cap screw. On the shaft is a cylindrical mass which sees a load (Mass OD > Washer OD, Mass ID =24mm)). If you want a number, we'll say 1500lb-f total from the mass onto the washer.
Arbitrary washer dimensions are t=2mm (thickness), D1=6.4mm (ID), D2=26mm (OD).
Primary shear is easy (F/2*(pi)*r*t) with r=12mm, but bending stress is giving me a headache.
Any thoughts on how to approach this? Since the bending is evenly distributed to every point along the 360 degree ontact area, would integrating the standard bending stress equation (stress = Mc/I) do me any good? I'd hate to go through the motions and find it a waste of time, as it would appear at first to be a difficult problem to set up.
Thanks in advance for your input.
The setup is a washer held against the end of a 24mm shaft via a standard machine cap screw. On the shaft is a cylindrical mass which sees a load (Mass OD > Washer OD, Mass ID =24mm)). If you want a number, we'll say 1500lb-f total from the mass onto the washer.
Arbitrary washer dimensions are t=2mm (thickness), D1=6.4mm (ID), D2=26mm (OD).
Primary shear is easy (F/2*(pi)*r*t) with r=12mm, but bending stress is giving me a headache.
Any thoughts on how to approach this? Since the bending is evenly distributed to every point along the 360 degree ontact area, would integrating the standard bending stress equation (stress = Mc/I) do me any good? I'd hate to go through the motions and find it a waste of time, as it would appear at first to be a difficult problem to set up.
Thanks in advance for your input.





RE: Washer as load bearing element (analysis)
RE: Washer as load bearing element (analysis)
σ = 6M/t2
M varies with loading conditions.
Regards,
Cory
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RE: Washer as load bearing element (analysis)
doesn't a washer have load applied on one face, it appears by a nut about the size of the washer (so the load isn't concentrated on a part of the washer) and isn't this load reacted by a distributed pressure on the other face of the washer ...
it looks to me like loadin = load out and the washer isn't doing much to move the load around ??
RE: Washer as load bearing element (analysis)
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
RE: Washer as load bearing element (analysis)
This is a resource I'm not familiar with currently, but will look into.
Rb, this setup is not the generally accepted use for a washer :). I'm just trying to get away with a cheap solution.
Thanks all.
RE: Washer as load bearing element (analysis)