I am trying to determine some general cantilever equations. I have an aluminum beam extending out 235 mm (L) from an aluminum block. The beam is 25 mm wide (W) and 3 mm thick (H). A force is applied at a point approx. 200 mm from the block and I am interested at a point 25 mm away from the block, which is the active grid of a strain gauge. I know the exact measurement of vertical deflection at a point 100 mm from the block. I am assuming the modulus of elasticity E is 10*10^6 psi. In general, I have the following diagram: http://www.brentless.com/Images/station2.jpg In the diagram A: a driving rod that moves up and down from a loudspeaker setup not shown, this guides the cantilever on this end B: a measuring caliper to measure the vertical displacement at point alpha measured from the aluminum block C: a mounted strain gauge, the point of interest, centered at delta from the aluminum block D: an aluminum block mounted the cantilever on one end Z1: a known, measurable displacement at alpha distance Z2: a displacement not known, at the end of the beam alpha: the measurement from the block to the measuring caliper beta: the measurement from the caliper to the end of the beam gamma: the measurement from the caliper to the driving rod delta: the measurement from the block to the strain gauge My problems to this point, most formulas I have found assume that the measurement of deflection is actually taken at the end of the beam. So how can I use the measurement at the 100 mm point above. I don't specifically know the value of the force being applied (my cantilever is being driven up and down by a loudspeaker, so if possible I would like to leave out the force value and determine an equation based on the measurement of deflection. Thoughts? I am trying to determine a general equation of which I can relate to stress and strain the values and measurements I have stated above for a testing model. I am not a mechanical engineer, so I don't really understand this stuff, so I appreciate any advice or help anyone can give me.