Document Type
Article
Publication Date
1-25-2013
Abstract
The application of guided waves to interrogate remote areas of structural components has been researched extensively in characterizing damage. However, there exists a sparsity of work in using piezoelectric transducer-generated guided waves as a method of assessing stress intensity factors (SIF). This quantitative information enables accurate estimation of the remaining life of metallic structures exhibiting cracks, such as military and commercial transport vehicles. The proposed full wavefield approach, based on 3D laser vibrometry and piezoelectric transducer-generated guided waves, provides a practical means for estimation of dynamic stress intensity factors (DSIF) through local strain energy mapping via the J-integral. Strain energies and traction vectors can be conveniently estimated from wavefield data recorded using 3D laser vibrometry, through interpolation and subsequent spatial differentiation of the response field. Upon estimation of the Jintegral, it is possible to obtain the corresponding DSIF terms. For this study, the experimental test matrix consists of aluminum plates with manufactured defects representing canonical elliptical crack geometries under uniaxial tension that are excited by surface mounted piezoelectric actuators. The defects' major to minor axes ratios vary from unity to approximately 133. Finite element simulations are compared to experimental results and the relative magnitudes of the J-integrals are examined. Abstract © AIP.
Source Publication
AIP Conference Proceedings
Recommended Citation
Ayers, J. T., Owens, C. T., Liu, K. C., Swenson, E. D., Ghoshal, A., & Weiss, V. (2013). Guided wave-based J-integral estimation for dynamic stress intensity factors using 3D scanning laser Doppler vibrometry. AIP Conference Proceedings, 1511(1), 51–58. https://doi.org/10.1063/1.4789030
Included in
Atomic, Molecular and Optical Physics Commons, Materials Science and Engineering Commons, Structures and Materials Commons
Comments
© 2013 AIP Publishing LLC, published under an exclusive license with American Institute of Physics.
AFIT Scholar, as the repository of the Air Force Institute of Technology, furnishes the published Version of Record for this article in accordance with the sharing policy of the publisher, AIP Publishing. A 12-month embargo was observed.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in AIP Conf. Proc. 1511, 51–58 (2013) as fully cited below and may be found at DOI: 10.1063/1.4789030
Issue covers: The 39th Annual Review of Progress in Quantitative Nondestructive Evaluation, , QNDE 2012, Denver, 15 July 2012 through 20 July 2012.