SN Curve Calculator

Calculate SN Curve (N)





Formula

The formula to calculate the SN Curve (N) is:

\[ N = K \cdot S^m \]

Where:

What is the SN Curve?

The SN Curve represents the relationship between the cyclic stress amplitude and the number of cycles to failure for a material. It is used in fatigue analysis to predict the lifespan of materials under cyclic loading. The curve is typically plotted on a logarithmic scale, with the stress range on the x-axis and the number of cycles to failure on the y-axis.

Example Calculation

Let's assume the following values:

Using the formula to calculate the SN Curve:

\[ N = 1e12 \cdot 100^{-3} = 1e12 \cdot 1e-6 = 1e6 \text{ cycles} \]

The SN Curve value is 1,000,000 cycles.