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

Formula:

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

Load on Weld:

Tensile Stress:

Length of Single Fillet Lap Weld:

Thickness of Plate:

Shear Stress:

Length of Parallel Fillet Weld:

1. What is Length of Parallel Fillet Weld?

Definition: The length of parallel fillet weld is the distance between two consecutive ends of welds that run parallel to each other in a compound weld joint.

Purpose: This calculation helps determine how much parallel weld length is needed to carry the total load in combination with transverse welds.

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

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

Explanation: The formula calculates the required parallel weld length by considering the load not carried by the transverse weld.

3. Importance of Parallel Fillet Weld Calculation

Details: Proper calculation ensures weld joints have sufficient strength to carry applied loads while optimizing material usage and fabrication time.

4. Using the Calculator

Tips: Enter all values in proper units. Note that all inputs have a ±5% tolerance to account for material variations and measurement uncertainties.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a 0.707 factor in the formula?
A: The 0.707 factor accounts for the effective throat thickness in a 45° fillet weld.

Q2: What's the difference between parallel and transverse fillet welds?
A: Parallel welds run in the same direction as the applied load, while transverse welds are perpendicular to the load direction.

Q3: How does plate thickness affect the calculation?
A: Thicker plates require longer welds to distribute the load properly and prevent stress concentrations.

Q4: When would I use this calculation?
A: When designing compound weld joints that use both parallel and transverse fillet welds to carry loads.

Q5: What safety factors should I consider?
A: Always apply appropriate safety factors based on application criticality and material properties.