S-N curve

stress-number curve

In fatigue testing, a curve showing the relation between the value of stress and the number of cycles at that value of stress required to produce failure in the test specimen.
References in periodicals archive ?
In this seminar, participants will learn how to measure strain and calculate the stress, how to sum-up loads with a rainbow matrix and how to estimate lifetime using a S-N curve.
The material S-N curve for shear can be measured with specimens consisting of [+ or -]45[degrees] lay-ups, see Figure 4.
the log number of cycles-to-failure resulted in a linear S-N curve.
Battelle describes it as the mesh-insensitive structural stress method and says it is also called the master S-N curve method, because it can "correlate a massive amount of actual fatigue test data into a single S-N curve.
Figure 5 also shows the S-N curve for the specimens containing the weld line.
The parameters of the S-N curve were determined based on the test results, according to [27], defining a method to calculate the parameters including run-outs and run-out specimens re-tested at higher load levels.
Fatigue strength versus life is a stress-life curve, also called an S-N curve.
Standard S-N curves for both load and stress amplitude are obtained from the test data.
Appropriate S-N curves are presented for the assessment of the fatigue strength of different materials.
After an introduction, chapter two introduces the constant amplitude database, which contains results obtained in test conditions and which forms the basis of the basic S-N curves for various types of joint.