Perform rainflow cycle counting algorythm for fatigue analysis.

Purpose

This App can be used to perform the ASTM E1049-85 rainflow cycle counting algorythm for fatigue analysis.

Notes: This App needs Embedded Python and rainflow library.

Installation

1. Download the clusterNum.opx file, then drag-and-drop onto the Origin workspace.
2. The App will start downloading dependent Python libraries. Wait a few minutes until the download is completed and restart Origin.

Operation

1. Activate a worksheet. Click the App icon to bring up the dialog.
2. Select XY columns of time-stress data.
3. Select quantities to report.
   • Range: Maximum stress range of a cycle.
   • Mean: Average stress range of a cycle.
   • Count: Number of cycles (an unmatched half-cycle is counted as a half cycle).
   • Cycle index: 1-based start and end index of a cycle.
   • Cycle X: Start and end X of a cycle.
   • Range Bin Type: Output cycle ranges binned by rounding to a specified number of digits, number of bins or bin size.
4. Click OK.

Sample OPJU File
This app provides a sample OPJU file.  Right click the App icon in the Apps Gallery window, and choose Show Samples Folder from the short-cut menu. A folder will open. Drag-and-drop the project file Rainflow Counting Sample.opju from the folder onto Origin. The Notes window in the project shows detailed steps.
Note: If you wish to save the OPJU after changing, it is recommended that you save to a different folder location (e.g. User Files Folder).

Reference

https://pypi.org/project/rainflow/