Allowable Tensile Stress given Load Carried by Single Fillet Lap Weld Calculator

Tensile Stress Formula:

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

Load on Weld:

Length of Single Fillet Lap Weld:

Thickness of Plate:

Safety Factor (±5%):

Tensile Stress (Pa):

Allowable Tensile Stress (Pa):

Definition: The maximum tensile stress that a single fillet lap weld can safely withstand, considering a safety factor.

Purpose: Helps engineers determine if a weld design can handle expected loads without failure.

The calculator uses the formula:

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

Where:

Explanation: The load is divided by the effective weld area (0.707 factor accounts for 45° fillet weld throat).

Details: Proper calculation ensures weld integrity, prevents structural failures, and meets safety standards.

Tips: Enter the load in Newtons, weld length and plate thickness in meters, and safety factor (default 1.5%). All values must be > 0.

Q1: Why the 0.707 factor?
A: It accounts for the throat area of a standard 45° fillet weld (cos45° = 0.707).

Q2: What's a typical safety factor for welds?
A: Typically 1.5-2.0 (50%-100%), but depends on application and standards.

Q3: How does plate thickness affect the calculation?
A: Thicker plates reduce stress for the same load, as they increase weld area.

Q4: What units should I use?
A: Use Newtons for load, meters for dimensions. Results are in Pascals (Pa).

Q5: Does this account for dynamic loads?
A: No, this is for static loading. Dynamic loads require additional factors.