Tensile Strength Calculator Formula
Understand the math behind the tensile strength calculator. Each variable explained with a worked example.
Formulas Used
Ultimate Tensile Strength
uts = max_load / areaUltimate Tensile Strength
uts_ksi = max_load / area * 0.145038Variables
| Variable | Description | Default |
|---|---|---|
max_load | Maximum Load (F)(N) | 45000 |
area | Original Cross-Sectional Area (A)(mm²) | 78.54 |
How It Works
Ultimate Tensile Strength
The ultimate tensile strength (UTS) is the maximum engineering stress a material can sustain before fracture in a standard tension test.
Formula
UTS = F_max / A_0
where F_max is the peak load recorded during the tensile test and A_0 is the original cross-sectional area of the specimen. This is an engineering stress (based on original area), not true stress.
Worked Example
A 10 mm diameter steel rod fails at 45 kN.
max_load = 45000area = 78.54
- 01Area of 10 mm diameter rod = pi × 5² = 78.54 mm²
- 02UTS = 45000 / 78.54 = 572.9 MPa
- 03In ksi: 572.9 × 0.145 = 83.1 ksi
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