Tesch, Andreas and Pippan, Reinhard and Döker, Hubert (2006) New Testing Procedure to Determine da/dN - K curves at different, Constant R-Values Using One Single Specimen. In: Fatigue 2006, Proceedings 9th International Fatigue Congress May 14-19, 2006 Atlanta , Georgia, USA. Elsevier Ltd., GB. Fatigue 2006, 9th International Fatigue Congress, 2006-05-14 - 2006-05-19, Atlanta, Georgia, USA.
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A new concept for fatigue crack propagation tests has been developed. Using a single specimen, it is possible to determine fatigue crack growth curves (da/dN - K) for every stress ratio between R = 0.9 and R = -1. Additionally, the new concept also provides threshold values for fatigue crack growth for different values of R. In combination with a continuous, autonomous crack length measurement tool (such as the DC potential drop method) this testing procedure can be implemented with minimal time and effort. The test procedure consists of a sequence of Kmax - constant tests with decreasing crack growth rates. There should be no load history effects. According to the procedures described in the ASTM Standard E 647, the results using this new testing procedure fit very well to the da/dN - K curves generated with different specimens. The tests fulfil all the requirements of ASTM Standard E 647.
|Document Type:||Conference or Workshop Item (Speech, Paper)|
|Title:||New Testing Procedure to Determine da/dN - K curves at different, Constant R-Values Using One Single Specimen|
|Journal or Publication Title:||Fatigue 2006, Proceedings 9th International Fatigue Congress May 14-19, 2006 Atlanta , Georgia, USA|
|In ISI Web of Science:||No|
|Publisher:||Elsevier Ltd., GB|
|Keywords:||Long cracks, fatigue crack growth, Kmax - tests, threshold, aluminium alloys|
|Event Title:||Fatigue 2006, 9th International Fatigue Congress|
|Event Location:||Atlanta, Georgia, USA|
|Event Type:||international Conference|
|Event Dates:||2006-05-14 - 2006-05-19|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Structures & Materials|
|Institutes and Institutions:||Institute of Materials Research > Mechanical Testing of Materials|
|Deposited By:||Dr.-Ing. Hubert Döker|
|Deposited On:||12 Dec 2006|
|Last Modified:||14 Jan 2010 23:57|
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