2022 Walker-Newman IRAD: Difference between revisions

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|'''''Point of Contact(s):'''  Kevin Walker''
|'''Point of Contact:'''  ''Kevin Walker''
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|[[File:RMIT IRAD Stage 2 SOW - no$.pdf|thumb|7075-T7351 work]]'''''Objective:'''  IRAD stands for "Internal Research and Development" which is a mechanism used by QinetiQ to fund research projects.  In this case, we have completed a major project including testing and analytical model development.  The project aim was to account for an observed behaviour for modelling of fatigue crack growth where the analysis results consistently under predict the test life.  This was evident in the DST ASSIST Challenge presented at the ASIP Conference in 2020.  The project here considered three materials; 2024-T3, 7075-T6 and 7075-T7351.  Testing was performed on Middle Tension (M(T)) specimens under conditions of Constant Amplitude loading in the constraint-loss regime, with and without spike overloads, and also under representative spectrum loading. The project scope is detailed in the attached documents.''[[File:FTA IRAD Stage 2 SOW - no$.pdf|thumb|2024-T3 and 7075-T6 IRAD]]  
|'''Objective:'''  IRAD stands for "Internal Research and Development" which is a mechanism used by QinetiQ to fund research projects.  In this case, we have completed a major project including testing and analytical model development.  The project aim was to account for an observed behaviour for modelling of fatigue crack growth where the analysis results consistently under predict the test life.  This was evident in the DST ASSIST Challenge presented at the ASIP Conference in 2020.  The project here considered three materials; 2024-T3, 7075-T6 and 7075-T7351.  Testing was performed on Middle Tension (M(T)) specimens under conditions of Constant Amplitude loading in the constraint-loss regime, with and without spike overloads, and also under representative spectrum loading. The project scope is detailed in the document below:
 
* [https://residualstress.org/images/0/0d/FTA_IRAD_Stage_2_SOW_-_no%24.pdf Statement of Work for the IRAD Project related to the 2024-T3 and 7075-T6 materials]
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|Results/outputs
|'''Results'''
 
*[https://residualstress.org/images/e/e0/MPC-2023-0074.R1_Proof_hi.pdf MPC Paper]
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*[https://residualstress.org/images/4/41/Newman_Walker_ASIP_2022.pdf ASIP 2022 Presentation]
*
*[https://residualstress.org/images/c/ca/ICAF2023-Paper-Newman-Walker-final.pdf ICAF 2023 Paper]
* [[File:Newman Walker ASIP 2022.pdf|thumb]][[File:ICAF2023-Paper-Newman-Walker-final.pdf|thumb]][[File:Newman-Walker-ICAF2023.pdf|thumb]]
*[https://residualstress.org/images/2/2f/Newman-Walker-ICAF2023.pdf Newman Walker 2023 ICAF Presentation]
*[https://residualstress.org/images/e/e3/Walker_etal_IJF_2024.pdf Walker etal IJF 2025]
*[https://residualstress.org/images/1/16/Newman_Walker_EFM_2025_Final.pdf Newman Walker EFM 2025]
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Latest revision as of 02:10, 7 May 2026

Point of Contact: Kevin Walker
Objective: IRAD stands for "Internal Research and Development" which is a mechanism used by QinetiQ to fund research projects. In this case, we have completed a major project including testing and analytical model development. The project aim was to account for an observed behaviour for modelling of fatigue crack growth where the analysis results consistently under predict the test life. This was evident in the DST ASSIST Challenge presented at the ASIP Conference in 2020. The project here considered three materials; 2024-T3, 7075-T6 and 7075-T7351. Testing was performed on Middle Tension (M(T)) specimens under conditions of Constant Amplitude loading in the constraint-loss regime, with and without spike overloads, and also under representative spectrum loading. The project scope is detailed in the document below:
Results
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