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Statistical and Probabilistic Analysis of Thermal-Fatigue Test Data Generated Using V-Shape Specimen Testing Method

[+] Author Affiliations
Zhigang Wei, Burt Lin

Tenneco, Inc., Grass Lake, MI

Kay Ellinghaus, Markus Pieszkalla

Tenneco GmbH, Edenknoben, Germany

D. Gary Harlow

Lehigh University, Bethlehem, PA

Kamran Nikbin

Imperial College London, London, UK

Paper No. PVP2013-97628, pp. V06AT06A081; 9 pages
doi:10.1115/PVP2013-97628
From:
  • ASME 2013 Pressure Vessels and Piping Conference
  • Volume 6A: Materials and Fabrication
  • Paris, France, July 14–18, 2013
  • Conference Sponsors: Pressure Vessels and Piping Division, Nondestructive Evaluation Engineering Division
  • ISBN: 978-0-7918-5570-6
  • Copyright © 2013 by ASME

abstract

V-shape specimen testing is a relatively new, simple and useful technique to characterize the thermal-fatigue resistance of materials subjected to combined thermal/mechanical loadings, and to rank and select materials. However, the V-shape specimen test data, similar to many other life test data, always contain an inherent scatter not only because of material non-uniformity but also of the difficulties in operating control, such as loading, boundary conditions, and environment. Therefore, statistical and probabilistic approaches have to be used to interpret the test data in order to implement the observations into new product designs. In this paper, the V-shape specimen test data are selected, analyzed and the scatter properties of the test data are fitted using several continuous probability distribution functions. The results are compared, and the root failure mechanisms of the V-specimens are also discussed. Finally, the main observations are summarized, and a recommendation is provided.

Copyright © 2013 by ASME
Topics: Fatigue , Testing , Shapes

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