Thermography and acoustic emission for monitoring the fracture of aluminium plates

E. Z. Kordatos, D. G. Aggelis, T. E. Matikas

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Acoustic Emission (AE) supplies information on the fracturing behavior of different materials. In this study, AE activity was recorded during fatigue experiments in metal coupons with a V-shape notch which were loaded in fatigue until final failure. AE parameters exhibit a sharp increase approximately 1000 cycles before than final failure. Therefore, the use of acoustic emission parameters is discussed both in terms of characterization of the damage mechanisms, as well as a tool for the prediction of ultimate life of the material under fatigue. Additionally, an innovative nondestructive methodology based on lock-in thermography is developed to determine the crack growth rate using thermographic mapping of the material undergoing fatigue. The thermographic results on the crack growth rate of aluminium alloys were then correlated with measurements obtained by the conventional compliance method, and found to be in agreement.

Original languageEnglish
Title of host publicationNondestructive Testing of Materials and Structures :Proceedings of NDTMS-2011, Istanbul, Turkey,May 15-18, 2011
EditorsOral Buyukozturk
PublisherSpringer
Pages519-524
Number of pages6
ISBN (Print)9789400707221
DOIs
Publication statusPublished - 1 Dec 2012

Publication series

NameRILEM Bookseries
Volume6
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852

Keywords

  • Acoustic emission
  • Aluminum
  • Fracture
  • Thermography

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