Length of Single Fillet Lap Weld given Total Load Carried by Plates in Compound Weld Calculator

Formula Used:

\[ L_{single} = \frac{W - 1.414 \times \tau \times L_{parallel} \times t_{plate}}{0.707 \times \sigma_t \times t_{plate}} \]

Load on weld:

Shear Stress:

Length of Parallel Fillet Weld:

Thickness of Plate:

Tensile Stress:

Tolerance:

Length of Single Fillet Lap Weld (m):

Tolerance Range (±5%):

1. What is Length of Single Fillet Lap Weld Calculator?

Definition: This calculator determines the required length of a single fillet lap weld in a compound weld joint based on the total load carried by the plates.

Purpose: It helps welding engineers and designers ensure proper weld sizing for structural integrity in compound weld configurations.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ L_{single} = \frac{W - 1.414 \times \tau \times L_{parallel} \times t_{plate}}{0.707 \times \sigma_t \times t_{plate}} \]

Where:

\( L_{single} \) — Length of single fillet lap weld (meters)
\( W \) — Load on weld (Newtons)
\( \tau \) — Shear stress (Pascals)
\( L_{parallel} \) — Length of parallel fillet weld (meters)
\( t_{plate} \) — Thickness of plate (meters)
\( \sigma_t \) — Tensile stress (Pascals)

Explanation: The formula calculates the required length of the single fillet weld by accounting for the load sharing between the parallel and single fillet welds in a compound joint.

3. Importance of Weld Length Calculation

Details: Proper weld length ensures the joint can carry the design load without failure while maintaining structural integrity and safety factors.

4. Using the Calculator

Tips:

Enter all values in consistent units (Newtons, Pascals, meters)
Default tolerance is ±5% but can be adjusted
All input values must be positive numbers

5. Frequently Asked Questions (FAQ)

Q1: What is a compound weld?
A: A compound weld combines different types of welds (like parallel fillet and single fillet) to share the load.

Q2: Why is tolerance important in weld calculations?
A: Tolerance accounts for material variations, fabrication imperfections, and safety factors in real-world applications.

Q3: What are typical shear stress values for welds?
A: Shear stress varies by material but typically ranges from 60-140 MPa for structural steel welds.

Q4: How does plate thickness affect the calculation?
A: Thicker plates require longer welds to develop sufficient strength, as the weld throat area is proportional to plate thickness.

Q5: When would I need to calculate single fillet weld length?
A: When designing compound weld joints where parallel fillet welds alone cannot carry the full load.