Beam Deflection

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)

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