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Shear Flow - Q·V/I Check

Shear flow q = V·Q/I for a longitudinal member at a specific height above keel - the stress check for side plating, deck plating.

Shear flowHull girderBending
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Formula, assumptions, and limits

q=VQIq = \frac{V \cdot Q}{I}
SymbolMeaningUnit
VVShear forcekN
QQFirst moment of area above fibre
IIHull-girder moment of inertiam⁴

Source: IACS CSR Ch.5

In short

Shear flow q = V\u00b7Q/I for a longitudinal member at a specific height above keel - the stress check for side plating, deck plating.

Learn the theory Hull Strength and Longitudinal Bending