// multi-utility computation suite · offline · instant · precise
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eng.lap-joint-shear-stress Calculator
Calculates shear stress, bearing stress, and factor of safety in a lap joint from load, plate thickness, and fastener diameter. Lap joints are eccentric — the moment from eccentricity adds additional peel stress that the simple shear stress calculation ignores.
Inputs
F N
Applied force or weight (N or kN). Divide into dead load (permanent) and live load (variable — people, wind, etc.).
W Mm
Horizontal extent perpendicular to the length.
L Mm
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Results
average shear stress τ_avg (MPa)
The arithmetic mean -- sum divided by count.
peak shear (Volkersen, MPa)
Sample size or count used in the calculation.
bonded area A (mm²)
The computed two-dimensional surface area.
τ = F / (w × L)
Reference formula or conversion factor shown for context.
peak factor
A dimensionless multiplier applied in the calculation.
design note
Supplementary information explaining an assumption, caveat, or important context for interpreting the result.