1. What is Metric Bolt Shear Strength?

The shear strength of a metric bolt is the maximum force it can withstand when subjected to shear loading before failure occurs. It depends on the bolt material's shear stress and its cross-sectional area.

2. How Does the Calculator Work?

The calculator uses the shear strength formula:

Where:

• \( F \) — Shear force (N)
• \( \tau \) — Shear stress of bolt material (MPa)
• \( d \) — Nominal diameter of bolt (mm)
• \( \pi \) — Mathematical constant (~3.1416)

Explanation: The equation calculates the force by multiplying the material's shear stress by the bolt's cross-sectional area.

3. Importance of Shear Strength Calculation

Details: Calculating shear strength is essential for proper bolt selection in mechanical designs, ensuring structural integrity and safety under shear loads.

4. Using the Calculator

Tips: Enter the bolt material's shear stress in MPa and the nominal bolt diameter in mm. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is typical shear stress for common bolt materials?
A: For steel bolts, shear stress typically ranges from 200-400 MPa, depending on grade and material properties.

Q2: Should I apply a safety factor to the result?
A: Yes, engineering applications typically apply safety factors (often 2-5x) to account for dynamic loads and material variations.

Q3: Does thread affect shear strength?
A: This calculation uses nominal diameter. For precise results, use root diameter of threaded portion if shear occurs in threaded section.

Q4: How does shear strength compare to tensile strength?
A: For most ductile materials, shear strength is approximately 60% of tensile strength.

Q5: Can this be used for bolts in double shear?
A: No, this calculates single shear. Double shear would theoretically double the capacity, but other factors must be considered.