Guided waves and defect scattering in metal matrix composite platesGuided Rayleigh-Lamb waves in a continuous graphite fiber reinforced magnesium plate has been studied. The interest in this material arises from its high thermal stability and because it provides high strength-to-weight ratio. Previous studies have shown that for wavelengths much larger than the fiber diameters and spacing, the material can be characterized as transversely isotropic with the symmetry axis aligned with the fiber direction. Because of the high longitudinal stiffness of the graphite fibers, the material shows strong anisotropy, with very high modulus in the fiber direction. For this reason, dispersion of guided waves is strongly influenced by the deviation of the direction of propagation from the symmetry axis. Results are given for propagation in different directions and for scattering of antiplane shear waves by surface-breaking cracks and delaminations.
Document ID
19900061051
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Datta, Subhendu K. (Colorado Univ. Boulder, CO, United States)
Bratton, Robert L. (Colorado, University Boulder, United States)
Shah, Arvind H. (Manitoba, University Winnipeg, Canada)