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20 March 1997 Experimental determination of material stiffness constants for advanced composites using genetic algorithms
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Proceedings Volume 2921, International Conference on Experimental Mechanics: Advances and Applications; (1997) https://doi.org/10.1117/12.269802
Event: International Conference on Experimental Mechanics: Advances and Applications, 1996, Singapore, Singapore
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.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Krishnan Balasubramaniam "Experimental determination of material stiffness constants for advanced composites using genetic algorithms", Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); https://doi.org/10.1117/12.269802
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