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Homework Statement
I have this sort of design basically
http://img834.imageshack.us/img834/6650/14820321.jpg
I'd like to a force analysis on it to determine if it is a good design as a point load is applied at A (we want to reduce AB from bending).
Homework Equations
Force analysis
The Attempt at a Solution
I was not given the dimensions as yet so I am trying to do it with symbols initially.
Forces at the points are F (e.g. Force at A= FA)
Reaction forces are R
Weights are W
Moments are M
If needed angle CBD=θ, BCS=90°
Lengths are just the two points (e.g. Length of AB = AB)
Weight of ABC and BD are downwards (WABC, WBD) and there is a force at A, FA and a force in BD, FBD (at θ).
This induces a reaction at C and D, RCx,RDx,RCy and RDy
Since there is a force acting at a distance there is moment due to FA and FBD (MA and MBD).
Now I either will need to get an expression for deflection or bending stress. I believe I'd need to check both. Now I know how to do this with just the cantilever part alone, but the member BD is confusing me as to how to formulate the bending stress, σbending and deflection δ.
So firstly, is my free body diagram correct? (well mainly the forces I typed out, sorry I couldn't draw it in paint)
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