Calculadora de Límite Elástico Gratis
Determina el límite elástico de un material a partir de datos del ensayo de tracción. Método del 0.2%.
Yield Strength (0.2% offset)
381.97 MPa
Yield Strength (0.2% offset) vs Load at 0.2% Offset (F)
Fórmula
## Yield Strength (0.2% Offset Method) Yield strength marks the transition from elastic to plastic deformation. Since many materials do not have a sharp yield point, the 0.2% offset method draws a line parallel to the elastic region, offset by 0.2% strain, and the intersection with the stress-strain curve defines yield. ### Formula **sigma_y = F_yield / A_0** where F_yield is the load at the 0.2% offset intersection and A_0 is the original cross-sectional area.
Ejemplo Resuelto
A 10 mm diameter aluminum specimen yields at 30 kN using the 0.2% offset method.
- 01Area = pi × 5² = 78.54 mm²
- 02sigma_y = 30000 / 78.54 = 382.0 MPa
- 03In ksi: 382.0 × 0.145 = 55.4 ksi
Preguntas Frecuentes
Why use 0.2% offset instead of the exact yield point?
Many metals (especially aluminum and austenitic stainless steel) exhibit a gradual transition from elastic to plastic behavior with no sharp yield point. The 0.2% offset provides a consistent, repeatable way to define yield for all materials.
What is proof stress?
Proof stress is another name for the offset yield strength. In some standards, 0.1% or 0.5% offset values are used instead of 0.2%, depending on the material and application.
How is yield strength used in design?
Engineers apply a factor of safety (typically 1.5-3) to the yield strength to determine allowable stress. The design must keep working stresses below this allowable level to prevent permanent deformation.
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