Beam Deflection

File:DeflectionEquation.jpg

The deflection of a beam under load may be measured using a dial gauge for example but may also be calculated.

The equation opposite gives Deflection (Δ) of a simply supported beam loaded in the centre.

Where:

   W = Load
   L = Span
   E = Young's Modulus ( - a measure of how stiff the materials is)
   I = Moment of Inertia ( - a measure of the capacity of a cross section to resist bending)