Controlling wave propagation in solids using spatially variable elastic anisotropy
Stress wave propagation in solids may be controlled through spatially variable anisotropy. Recently, there have been significant efforts to guide the incident stress waves in desired trajectories in order to protect a sensitive region within the material. Here we present our work on a composite material in which stress waves are guided through smoothly varying elastic anisotropy, while keeping the mass density homogeneous. The axis of anisotropy corresponds to fiber orientation in fiber reinforced composites. In order to guide the stress waves, the axis of anisotropy should smoothly change direction to convey the energy of incident waves.
Keywordsstress wave anisotropy composite material and guide
Unable to display preview. Download preview PDF.
- 1.Amirkhizi, A. V., Tehranian, A. and Nemat-Nasser, S. “Stress-wave Energy Management through Material Anisotropy,” Wave Motion, (In Press)Google Scholar
- 2.Tehranian, A., Amirkhizi, A. V., Irion, J., Isaacs, J. and Nemat-Nasser, S. “Controlling Acoustic-wave Propagation through Material Anisotropy,” Proceedings of Health Monitoring of Structural and Biological Systems III, SPIE 16th Annual International Conference on Smart Structures and Materials & NDE and Health Monitoring, Vol. 7295, San Diego, California, March 9-12, 2009.Google Scholar
- 3.Tehranian, A., Amirkhizi, A. V. and Nemat-Nasser, S. “Acoustic Wave-energy Management in Composite Materials,” Proceedings of the SEM Annual Conference, Albuquerque, New Mexico, June 1-4, 2009.Google Scholar
- 4.Auld, B. A. “Acoustic fields and waves in solids,” John Wiley & Sons (1973).Google Scholar
- 5.Nemat-Nasser, S. and Hori, M., “Micromechanics: overall properties of heterogeneous materials,” Elsevier (1999).Google Scholar
- 6.Schaaf, K. L., “Composite materials with integrated embedded sensing networks,” thesis (PhD), University of California San Diego, 20-25, (2008).Google Scholar