Nonlinear Fatigue Damage Accumulation

• Autorzy: Dębski D. K.

Identyfikatory

DOI

10.1515/fas-2015-0003

• Języki publikacji: EN

Abstrakty

EN

One important element of any computational fatigue analysis is the adoption of a hypothesis of fatigue damage accumulation. The most commonly used is the hypothesis of linear accumulation of fatigue damage called the Palmgren-Miner hypothesis. This linear hypothesis does not take into account a factor of great importance: the mutual influence of consecutive fatigue load sequences on each other. In the presented paper, only two consecutive load sequences linked by mutual relations have been analyzed and the results of the analysis have been shown. A more complex form which takes into account the full load history would create complex formula difficult to use. Perhaps, we should go in this direction, especially that today we have enormous computing power at our disposal.

Słowa kluczowe

EN

cumulative fatigue damage; fatigue damage accumulation; cumulative damage rules; load interaction effects; fatigue life prediction

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2015
• Tom: Iss. 7
• Strony: 18--23
• Opis fizyczny: Bibliogr. 6 poz., rys., wykr., wzory

Twórcy

autor

Dębski D. K.

• Warsaw University of Technology, Narbutta 84 Street, 02- 524 Warsaw, Poland

Bibliografia

• [1] Fatemi A., Yang L.: Cumulative fatigue damage and life prediction theories: a survey of the state of the art for homogeneous materials. Int. J. of Fatigue, vol. 20, nº 1, pp. 9-34, 1998.
• [2] Schijve, J.: Fatigue of structures and materials in the 20th century and the state of the art. Materials Science, vol. 39, nº 3, pp. 307-333, 2003.
• [3] Debski M., Debski D.: Selected problems of fatigue strength of aircraft structures. Scientific Library of the Institute of Aviation 36, ISBN 978-83-63539-06-1, Warsaw 2014.
• [4] Szala J.: Hypotheses of fatigue damage summation. Academic Publisher of University of Technology and Agriculture, Bydgoszcz 1998.
• [5] Debski D.: Evaluation of material effort in selected structural elements with notches in the form of circular holes. Warsaw University of Technology, 2003
• [6] Debski D.: Fatigue tests of structure elements for loads spectrum of DEKO-9 Magic aerobatic aircraft. Warsaw University of Technology 2016 (work in course).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.