Shear Stress in Bolt Calculator by Tons of Concrete

Shear Stress in Bolt Calculator

Shear Stress in Bolt Formula:

\[ f_s = \frac{8 \times T_{bolt}}{n \times \pi \times d_{bolt}^2 \times d_{pitch}} \]

Torque resisted by bolt:

N·m

Number of Bolts:

Diameter of Bolt:

Diameter of bolt pitch circle:

Tolerance:

Shear Stress in Bolt (Pa):

1. What is Shear Stress in Bolt Calculator?

Definition: This calculator determines the shear stress experienced by bolts when resisting a given torque.

Purpose: It helps mechanical engineers and designers ensure bolt safety by calculating shear stress under torque loads.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ f_s = \frac{8 \times T_{bolt}}{n \times \pi \times d_{bolt}^2 \times d_{pitch}} \]

Where:

\( f_s \) — Shear stress in bolt (Pascals)
\( T_{bolt} \) — Torque resisted by bolt (Newton-meters)
\( n \) — Number of bolts
\( d_{bolt} \) — Diameter of bolt (meters)
\( d_{pitch} \) — Diameter of bolt pitch circle (meters)

Explanation: The formula calculates the shear stress distribution across multiple bolts resisting a torque load.

3. Importance of Shear Stress Calculation

Details: Proper shear stress calculation ensures bolt safety, prevents mechanical failures, and helps in selecting appropriate bolt sizes.

4. Using the Calculator

Tips: Enter the torque value, number of bolts, bolt diameter, pitch circle diameter, and optional tolerance percentage (default ±5%).

5. Frequently Asked Questions (FAQ)

Q1: What is bolt pitch circle diameter?
A: It's the diameter of the circle that passes through the center of all the bolts in a bolt pattern.

Q2: Why is the tolerance value important?
A: It provides a safety range accounting for material variations, manufacturing tolerances, and load uncertainties.

Q3: What's a typical shear stress limit for bolts?
A: This varies by material, but common steel bolts typically have shear strengths between 200-800 MPa.

Q4: How does number of bolts affect the result?
A: More bolts distribute the load, reducing shear stress on each individual bolt.

Q5: Can I use this for metric and imperial units?
A: The calculator uses metric units (meters, N·m). Convert imperial units before input.