v9.01.101 SZLZ101 - Damage calculation/Method RAINFLOW

Summary:

The purpose of this test is to calculate the damage based on a history of stress loading.

From a simple loading history defined by DEFI_FONCTION, the elementary cycles are extracted by the cycle counting method of RAINFLOW [R7.04.01], then the elementary damage associated with each cycle is calculated, by interpolation on the Wöhler curve of the material.

Various possibilities of introducing the Wöhler curve, as well as taking into account the elasto-plastic concentration coefficient, are tested.

Finally, we determine the total damage suffered by the room by adding up all the elementary damage by Miner’s linear rule.

This example is a validation test of software POSTDAM developed by Department REME, provided in the validation manual for version 1.0 of this software.

The results provided by the operator POST_FATIGUE are completely identical to those provided by the POSTDAM software.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
• 2. Benchmark solution
  • 2.1. Calculation method used for the reference solution
  • 2.2. Benchmark results
  • 2.3. Uncertainty about the solution
  • 2.4. Bibliographical references
• 3. Modeling A
  • 3.1. Tested sizes and results
• 4. Summary of results