Nominal projected-area screen
Pin shear & bearing stress
Inputs
Positive direct transverse load assumed to share equally across identical pins.
Integer count of pins assumed to share direct load equally.
Choose one or two ideal shear planes through every identical pin.
Nominal circular pin diameter at the stated shear plane.
Loaded plate thickness used for the projected bearing-area approximation.
Results
Direct load per equal pin
6,000
One nominal pin shear area
78.54
Nominal pin shear stress
38.197
Projected plate bearing area per pin
80
Projected plate bearing stress
75
Fpin = F/n; As = πd²/4; τnom = Fpin/(pAs); Aprojected = dt; σbearing = Fpin/(dt)
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: Axial response · Beam deflection & reactions · Elastic stability · Solid-shaft torsion
Method
Formula, when it applies, and when it does not
Calculate direct load per identical pin, nominal shear stress, and projected plate bearing stress from load, pin geometry, count, and shear-plane condition.
Fpin = F/n; As = πd²/4; τnom = Fpin/(pAs); Aprojected = dt; σbearing = Fpin/(dt)
When
- Identical pins share load equally
- Nominal circular shear area
- Projected bearing area
- Static/low-speed context
Don’t
- This assumes identical pins share the entered direct load equally, uses circular nominal shear area, and applies a projected-area bearing approximation. It does not evaluate pin bending, clearance, load-sharing variation, local contact/Hertz stress, yielding, fatigue, stress concentrations, material allowables, hole edge distance, joint geometry, selection, or approval.
AFFDL-TR-69-42, Stress Analysis Manual (US Air Force)