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Proceedings Paper

Coupled attenuation and multiscale damage model for composite structures
Author(s): Albert M. Moncada; Aditi Chattopadhyay; Brett Bednarcyk; Steven M. Arnold
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Paper Abstract

Composite materials are widely used in many applications for their high strength, low weight, and tailorability for specific applications. However, the development of robust and reliable methodologies to detect micro level damage in composite structures has been challenging. For composite materials, attenuation of ultrasonic waves propagating through the media can be used to determine damage within the material. Currently available numerical solutions for attenuation induce arbitrary damage, such as fiber-matrix debonding or inclusions, to show variations between healthy and damaged states. This paper addresses this issue by integrating a micromechanics analysis to simulate damage in the form of a fiber-matrix crack and an analytical model for calculating the attenuation of the waves when they pass through the damaged region. The hybrid analysis is validated by comparison with experimental stress-strain curves and piezoelectric sensing results for attenuation measurement. The results showed good agreement between the experimental stress-strain curves and the results from the micromechanics analysis. Wave propagation analysis also showed good correlation between simulation and experiment for the tested frequency range.

Paper Details

Date Published: 18 April 2011
PDF: 13 pages
Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79830U (18 April 2011); doi: 10.1117/12.880605
Show Author Affiliations
Albert M. Moncada, Arizona State Univ. (United States)
Aditi Chattopadhyay, Arizona State Univ. (United States)
Brett Bednarcyk, NASA Glenn Research Ctr. (United States)
Steven M. Arnold, NASA Glenn Research Ctr. (United States)


Published in SPIE Proceedings Vol. 7983:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011
H. Felix Wu, Editor(s)

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