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Fillet Size Formula:
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Fillet size calculation is used in welding to determine the appropriate size of a fillet weld based on the throat thickness. For a 45-degree fillet weld, the relationship between throat size and fillet size is defined by a specific mathematical formula.
The calculator uses the fillet size formula:
Where:
Explanation: The formula accounts for the geometric relationship in a 45-degree fillet weld where the fillet size is the hypotenuse of an isosceles right triangle.
Details: Accurate fillet size calculation is crucial for ensuring proper weld strength, meeting design specifications, and maintaining structural integrity in welded connections.
Tips: Enter throat thickness in millimeters. The value must be valid (throat > 0). The calculator will compute the corresponding fillet size for a 45-degree fillet weld.
Q1: Why is 0.707 used in the formula?
A: 0.707 is the cosine of 45 degrees (cos45° = √2/2 ≈ 0.707), which represents the relationship between the throat and leg of a 45-degree fillet weld.
Q2: Does this formula work for all fillet weld angles?
A: No, this specific formula is only valid for 45-degree fillet welds. Different angles require different calculations.
Q3: What are typical fillet sizes used in welding?
A: Fillet sizes typically range from 3mm to 20mm depending on the application, material thickness, and required strength.
Q4: How accurate is this calculation?
A: The calculation is mathematically precise for ideal 45-degree fillet welds, but actual welds may vary slightly due to welding technique and material properties.
Q5: Can this calculator be used for inspection purposes?
A: While it provides theoretical values, actual weld inspection should include physical measurement and compliance with relevant welding codes and standards.