Calcolatrice Resistenza Saldatura Gratuita
Calcola la capacità di una saldatura d'angolo.
Weld Load Capacity
105.2 kN
Weld Load Capacity vs Fillet Weld Leg Size (a)
Formula
Fillet Weld Strength
Fillet welds fail through the throat, which is the shortest path through the weld cross-section.
Key Relationships
Effective throat = 0.707 x leg size (for equal-leg fillets at 45 degrees)
Capacity = throat x length x allowable shear stress
The 0.707 factor is cos(45 degrees) = sin(45 degrees), representing the minimum cross-section through the triangular fillet.
Esempio Risolto
A 6 mm fillet weld, 200 mm long, with 124 MPa allowable shear (E70 electrode).
- 01Throat = 0.707 x 6 = 4.24 mm
- 02Capacity = 4.24 x 200 x 124 = 105,152 N = 105.2 kN
- 03Strength per mm = 4.24 x 124 / 1000 = 0.526 kN/mm
Domande Frequenti
What is the minimum fillet weld size?
Minimum weld size depends on the thicker plate being joined. For plates up to 6 mm, minimum fillet is 3 mm. For plates 6-13 mm, minimum is 5 mm. For plates over 13 mm, minimum is 6 mm (per AWS D1.1).
Why is the throat thickness less than the leg size?
The weld fails along its weakest plane, which cuts diagonally through the fillet. This diagonal distance (the throat) is shorter than the leg by a factor of cos(45) = 0.707.
Do I need to account for the weld return?
Weld returns (wrapping the weld around corners) add modest capacity and help reduce stress concentrations. Many codes require returns of at least 2 times the weld size at ends of members.
Impara