| 摘要 |
A technique for generating a combined model for isothermal and anisothermal fatigue life of a material is provided. As per the technique, multiple strain-controlled fatigue tests are performed on the material. For each test, test data is generated that includes a normalized load and a number of cycles to crack imitation in the material under the normalized load. The normalized load is a function of multiple instantaneous load levels determined at different points in time during the test. Each individual instantaneous load level is determined by normalizing a measured stress at an instant with a value of a temperature dependent property of the material corresponding to a temperature of the test at that instant. The test data from the plurality of strain- controlled tests are processed to generate a combined lifetime model defining a response of the number of cycles to crack initiation to the normalized load. |
