Known axial & shear loads
Single-bolt loading
Inputs
Nominal unthreaded shank diameter used for the direct stress screen.
Direct known axial tension carried by this one bolt.
Direct known transverse shear carried by this one bolt.
Direct load transferred through one stated bearing interface.
Loaded plate or washer thickness used for projected bearing area.
Results
Nominal shank tensile stressσ
70.736
Nominal shank shear stressτ
35.368
Projected bearing stressσb
62.5
Plane-stress equivalentσe
93.574
σ = Ft/(πd²/4); τ = Fs/(πd²/4); σbearing = Fb/(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 nominal shank tensile stress, shear stress, direct bearing stress, and a plane-stress equivalent for one user-defined bolt and bearing interface.
σ = Ft/(πd²/4); τ = Fs/(πd²/4); σbearing = Fb/(dt)
When
- One bolt
- Known direct loads
- Nominal shank area
- Centric bearing interface
Don’t
- This is a single-bolt, known-direct-load screen using nominal shank and projected bearing areas. It excludes threads/tensile-stress area, preload, joint stiffness, load distribution, eccentricity, friction, slip, prying, washer geometry, proof/yield allowables, fatigue, tear-out, thread stripping, and factor-of-safety conclusions.
SAND2008-0371, Guideline for Bolted Joint Design and Analysis (Sandia)