Length of Single Fillet Lap Weld given Load Carried by Single Fillet Lap Weld Calculator

Length of Single Fillet Lap Weld Formula:

\[ L_{single} = \frac{W}{0.707 \times \sigma_t \times t_{plate}} \]

Load on weld:

Tensile Stress:

Thickness of Plate:

Tolerance:

Length of Single Fillet Lap Weld (m):

1. What is Length of Single Fillet Lap Weld?

Definition: The length of single fillet lap weld is the distance between two consecutive ends of welds needed to carry a specific load.

Purpose: This calculation helps welding professionals determine the appropriate weld length for a given load, material stress, and plate thickness.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ L_{single} = \frac{W}{0.707 \times \sigma_t \times t_{plate}} \]

Where:

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

Explanation: The load is divided by the product of 0.707 (factor for fillet weld), tensile stress, and plate thickness to determine the required weld length.

3. Importance of Weld Length Calculation

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

4. Using the Calculator

Tips: Enter the load in Newtons, tensile stress in Pascals, plate thickness in meters, and tolerance percentage (default ±5%). All values must be > 0 except tolerance which can be negative.

5. Frequently Asked Questions (FAQ)

Q1: What is the 0.707 factor in the formula?
A: This is the theoretical throat thickness factor for a 45° fillet weld, representing the effective area resisting the load.

Q2: How does plate thickness affect weld length?
A: Thicker plates require shorter welds for the same load, as the weld strength increases with plate thickness.

Q3: What is a typical tolerance for weld length?
A: ±5% is common, but this may vary based on application requirements and standards.

Q4: How do I determine the tensile stress value?
A: Tensile stress is typically specified by the material properties or welding standards for the specific material being welded.

Q5: Does this calculation account for weld quality?
A: No, this assumes perfect weld quality. Actual welds may require additional length to account for potential defects.