Exported durability function-based results

The following example is used to explain the durability function-based results that are displayed in the spreadsheet or the CSV file to which they are exported.

Example:

The variable amplitude stress history consists of two full cycles:

• Cycle 1 has a stress amplitude of +/- 35 MPa and a stress range of 70 MPa.

• Cycle 2 has a stress amplitude of +/- 70 MPa and a stress range of 140 MPa.

Both cycles have a zero mean stress.

Fatigue Evaluation Results: Counts is the count range-mean matrix. For each stress or strain range and each mean stress or strain, the count range-mean matrix displays the number of loading cycles in all stress or strain functions that are listed in the functions table of the Durability Damage Evaluation dialog box.

Example:

For the example stress history with two full cycles, one cycle is counted for the 70 000 kPa stress range and 0 kPa mean stress. This is Cycle 1. And one cycle is counted for the 140 000 kPa stress range and 0 kPa mean stress. This is Cycle 2.

The count range-mean matrix

Fatigue Evaluation Results: Damage is the damage range-mean matrix. For each stress or strain range and each mean stress or strain, the damage range-mean matrix displays the damage that is caused by all loading cycles in the range-mean pair for all stress or strain functions that are listed in the functions table of the Durability Damage Evaluation dialog box.

Example:

For the example stress history with two full cycles, 4.36 x 10-13 damage is done by Cycle 1 and 1.91 x 10-10 is done by Cycle 2.

The damage range-mean matrix

Fatigue Evaluation Results: Percent Total Damage is the percent total damage range-mean matrix. For each stress or strain range and each mean stress or strain, the percent total damage range-mean matrix displays the percent of the total damage that is caused by all loading cycles in the range-mean pair for all stress or strain functions that are listed in the functions table of the Durability Damage Evaluation dialog box.

Example:

For the example stress history with two full cycles, Cycle 2 produces 99.8 % of the total damage and Cycle 1 produces the rest (0.2 %).

The percent total damage range-mean matrix

Total Counts displays the total number of counted loading cycles for all functions.

Out of Range Counts displays the numbers of counted loading cycles that are out of range of the bins.

Total Damage displays the total damage for all loading cycles and for all functions.

Out of Range Damage displays the damage that is caused by all loading cycles that are out of range of the bins.

Crack Initiation Estimate is the inverse of the total damage in number of events, NE. The value of the crack initiation estimate in hours is given by NE ∙∑(tR ∙Nocc) where tR and Nocc are the time range and number of occurrences of each function, respectively.

How do I

Evaluate the durability damage of a stress history

Learn more

Durability damage evaluation

Analyzing strain gage rosette data

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Exported durability function-based results, Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });