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The complete elastic-constant tensor C ij and the corresponding internal friction Q −1ij for a crossply composite are measured. It consists of silicon-carbide fibers in a Ti–6Al–4V matrix; it contained 35vol.% fibers. With tetragonal symmetry, this composite possesses six independent C ij and Q −1ij . Principally, two measurement methods were used: noncontacting...
We studied the elastic constants of a lotus-type porous copper, regarding it as a composite material showing hexagonal elastic symmetry with the c-axis along the longitudinal direction of the pores. We used the combination of resonance ultrasound spectroscopy and electromagnetic acoustic resonance methods to determine the elastic constants of the composite. The resulting Young's modulus E ...
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