1. What is Resistance Offered by Weld Per Unit Length?

Definition: This calculator determines the resistance of weld per unit length based on the moment of inertia, length of top weld, and distance from the gravity axis.

Purpose: It helps structural engineers and welders calculate weld resistance for design and analysis purposes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( s \) — Resistance of weld per unit length (N)
• \( I \) — Moment of inertia of weld (kg·m²)
• \( L_{top} \) — Length of top weld (m)
• \( a \) — Distance of top weld from gravity axis (m)

Explanation: The moment of inertia is divided by the product of weld length and distance from the axis to determine resistance.

3. Importance of Weld Resistance Calculation

Details: Proper weld resistance estimation ensures structural integrity, load-bearing capacity, and safety of welded joints.

4. Using the Calculator

Tips: Enter the moment of inertia, weld length, distance from axis, and tolerance percentage (default ±5%). All values must be > 0 except tolerance.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical tolerance for weld resistance?
A: Standard tolerance is ±5%, but this may vary based on material and welding specifications.

Q2: How do I determine the moment of inertia for a weld?
A: The moment of inertia depends on the weld geometry and can be calculated using standard formulas or CAD software.

Q3: Why is distance from gravity axis important?
A: The resistance varies with distance due to the moment arm effect in the weld joint.

Q4: Can this calculator be used for different weld types?
A: Yes, as long as you have the correct moment of inertia and geometry parameters.

Q5: How does tolerance affect the results?
A: The tolerance provides a range to account for material variations and manufacturing imperfections.

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