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Proceedings Paper

Experimental determination of material stiffness constants for advanced composites using genetic algorithms
Author(s): Krishnan Balasubramaniam
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Paper Abstract

In this paper, efforts on the measurements of material properties of multi-layered fiber reinforced composites such as graphite epoxy employing an inverse method based on Genetic Algorithms (GAs) using oblique incidence ultrasonic velocity data will be discussed. Both, direct as well as inverse genetic methods were used in this effort. The phase velocity data as a function of the angle of incidence as well as the azimuthal angles for orthotropic uni-directional composite laminates were used as the input to the Genetic Algorithm. Optimal parameters were chosen from the sensitivity analysis using a direct approach. Then, inversion algorithms was introduced to compute the material properties from the ultrasonic phase velocity data. Sensitivity as well as accuracy of the techniques are also discussed for both noise- free and noisy simulated data sets.

Paper Details

Date Published: 20 March 1997
PDF: 4 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269802
Show Author Affiliations
Krishnan Balasubramaniam, Mississippi State Univ. (United States)

Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications
Fook Siong Chau; C. T. Lim, Editor(s)

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