1. What is Bolt Tearout?

Bolt tearout refers to the failure mode where a bolt tears through the material it's fastened to, rather than the bolt itself failing. This calculation helps engineers ensure that the material around the bolt is strong enough to resist this type of failure.

2. How Does the Calculator Work?

The calculator uses the tearout formula:

Where:

• \( Shear\ Strength \) — Material's resistance to shear forces (MPa)
• \( Length \) — Distance from bolt center to edge (mm)
• \( Thickness \) — Material thickness (mm)

Explanation: The equation calculates the force required to tear the material around the bolt hole.

3. Importance of Tearout Calculation

Details: Proper tearout calculation ensures structural integrity in bolted connections, preventing catastrophic failures in mechanical and structural applications.

4. Using the Calculator

Tips: Enter material shear strength in MPa, length in mm, and thickness in mm. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's typical shear strength for common materials?
A: Mild steel ~300 MPa, Aluminum ~200 MPa, but always consult material specifications.

Q2: How is length measured?
A: Minimum distance from bolt center to the edge of the material in the direction of force.

Q3: Does bolt diameter affect tearout?
A: Indirectly - larger bolts typically require more edge distance (length in formula).

Q4: What safety factor should be used?
A: Typically 2-5x depending on application criticality and loading conditions.

Q5: How does multiple bolt configuration affect tearout?
A: Multiple bolts may share load, but net-section failure must also be considered.