Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Torque Newton Meters (N·m)

Required number input.

Enclosed Median Area Square Meters (m²)

Required number input.

Wall Thickness Meters (m)

Required number input.

Bredt–Batho mean shear stress in a closed thin-walled single-cell section with uniform wall thickness: τ=T/(2Amt). The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Shear Stress Pascals (Pa)

The resulting shear stress pascals returned as a number.

• Stress, strain, section, and torsion equations assume stated geometry, loads, supports, material behavior, and small deformation. Stress concentrations, instability, fatigue, fracture, plasticity, residual stress, and code factors may govern.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Thin Walled Hoop Stress

  Thin-walled cylindrical pressure-vessel hoop stress pr/t; requires wall thickness small relative to radius.

• Bolt Shear Capacity

  Nominal single-shear force from bolt shear area times a user-supplied allowable shear stress; not a code-rated connection capacity.

• Shear Stress Beam

  Elastic beam shear stress τ=VQ/(Ib) at a section with supplied first and second area moments and local width.