| DOI | Resolve DOI: https://doi.org/10.1007/978-3-030-21503-3_53 |
|---|
| Author | Search for: Bombardier, Yan1; Search for: Li, Gang1; Search for: Renaud, Guillaume1 |
|---|
| Affiliation | - National Research Council of Canada. Aerospace
|
|---|
| Format | Text, Book Chapter |
|---|
| Conference | 30th Symposium of the International Committee on Aeronautical Fatigue, June 2-7, 2019, Krakow, Poland |
|---|
| Subject | residual stress; fatigue; cold working; crack growth; ForceMate |
|---|
| Abstract | ForceMate high interference fit expanded bushings, made by Fatigue Technology Inc. (FTI), are used by aircraft designers and maintainers to improve the fatigue and wear resistance of holes. While the fatigue life improvement (LIF) resulting from the installation of ForceMate bushings has been demonstrated experimentally, no analytical methods have been officially approved yet to take full benefit from the beneficial state of interference and residual stress resulting from this technology. To address this gap, a methodology was developed to analytically determine the LIF resulting from the installation of ForceMate bushings by explicitly taking into account the residual stresses and the effect of high interference fit bushings. To achieve this, a three-dimensional residual stress field is obtained from finite element process modelling of the ForceMate installation; fatigue crack nucleation lives are calculated; crack propagation analyses are conducted to calculate the resulting crack shapes and stress intensity factors, and the crack growth predictions are performed. This methodology was demonstrated on a CF–188 bulkhead at the holes attaching the main landing gear uplock mechanism. Based on this analytical study, a LIF of 6.6 was predicted for crack nucleation and 4.9 for crack growth from a 0.254 mm quarter-circular crack to a through-the thickness crack. While there are several aspects of this analytical study that need to be validated experimentally, the calculated LIF correlates well with the LIF typically obtained with the ForceMate system. |
|---|
| Publication date | 2019-07-03 |
|---|
| Publisher | Springer Nature Switzerland AG |
|---|
| In | |
|---|
| Series | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 72aea8e5-1e31-4153-a430-bf47054405eb |
|---|
| Record created | 2020-07-10 |
|---|
| Record modified | 2020-07-22 |
|---|
