Analysis & Test
From Engineered Residual Stress Implementation (ERSI)
Revision as of 11:04, 30 August 2023 by Dallen-Andrew (talk | contribs)
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. |
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| 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. 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. |
| ERSI Original Cx Round Robin (2017) |
| Objective: Recent discussions within the ERSI Analysis Methods Subcommittee have identified a need to perform a series of round-robin exercises. Of particular focus is to identify the random and systematic uncertainties associated with Damage Tolerance Analyses (DTA) that incorporate residual stresses produced by Cold Expansion (Cx) of fastener holes. Many factors influencing the total uncertainty have been discussed and are currently under investigation by various members of the ERSI team. For the first round-robin exercise, which will be described herein, the focus will be on systematic uncertainties, or the uncertainty associated with the system or process used by the analyst (also known as epistemic uncertainties or model-form uncertainties). Specific input data (defined below) will be provided to each analyst participating in the exercise to minimize the random uncertainties associated with these types of analyses. The analyst is free to use any means to incorporate the residual stress into the DTA, any software suite, etc., however it’s important that the analyst adheres closely to the guidance in this document so that the variability in the predictions will be limited to the aspects left to analyst’s discretion. |
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| Misc Other |
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| Results |
