Analysis & Test

Welcome to the ERSI Analysis & Test committee website. A list of the current and previous round robin activities are listed below, along with all the associated files available for download.

Stress Intensity Factor Round Robin (2021)

Objective: The primary objective of the Stress Intensity Factor (SIF) round robin was to evaluate differences between available SIF solutions for a single corner crack at a fastener hole with remote uniform tension loading. The evaluations included not only the root SIF solution but any corrections to account for single vs multiple cracks, finite width, and hole offset. These solutions were compared to explicit Finite Element Analysis (FEA) results of each case. Any findings were intended to drive improvements to solutions available to the fracture mechanics community.

ASIP Conference Presentation_ERSI SIF Round Robin.pdf ERSI-2021-01 Stress Intensity Comparison Round Robin & Data.pdf ERSI-2021-01 Stress Intensity Comparison Round Robin.pdf ICAF2023_ERSI_Final.pdf SIF Round Robin Data Summary.xlsx Cross-Comparisons of Stress Intensity Factors from Various Sources - The Pathway to Improved SIF Solutions.pdf SIF Comparison matrix - ERSI Round Robin.pdf

AFGROW Workshop Round Robin (2017)

Objective: The purpose of this round robin exercise is to determine the variability of users, given the same loading spectrum, material data, and Initial Flaw Size (IFS) to predict the evolution of the crack front shape and the total life of a given geometry using the AFGROW framework as the life prediction tool. As noted below, certain aspects of the AFGROW framework will be provided for common use by each participant, and others will be left to the user's discretion. It is important that each participant follow this guidance so that variability in the predictions is limited to the aspects left to user discretion. Test data from this Round Robin will be presented at the 2017 AFGROW Workshop along with predictions made by each participant. Each participant is invited to give a short presentation (10 minutes) outlining the pertinent details of their analyses. A group discussion will follow to help identify which analysis options worked best for this study, and what improvements to AFGROW may be helpful in the future. The results will be published on the AFGROW Web Page following the Workshop in a manner that will not identify who performed each prediction, but individuals will be provided with a key to know their results as they compare to the group.

ASIP Conference Presentation_ERSI SIF Round Robin.pdf ERSI-2021-01 Stress Intensity Comparison Round Robin & Data.pdf ERSI-2021-01 Stress Intensity Comparison Round Robin.pdf