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Observations and Measurements
Interpretation of the scattered signals
1 other sections not shown
3.l9l mm stainless amplitude spectra approximately arrival-times backscattering boundary conditions circular cylindrical circumferential wave Computed and measured computer program copper in polyester critical angle cs<cp cs>cp cylindrical coordinate system cylindrical inclusion denoted diameter elastic waves Figure 6a Figure l2 fluid inclusion incident pulse inclusion is greater inclusion material inclusion shear inverse Kl ray longitudinal wave speed matrix and inclusion matrix longitudinal matrix material measured spacing OSCILLOSCOPE P-wave Pao and Mow PCP ray polyester specimen predicted by Equation pressure wave pulse corresponding quartz R.E. Bunney radius ray paths shown Rayleigh-type wave receiver is placed Sachse scattered pulses scattered signals shear modulus shear wave speed shown in Figure sin_l(cp/cs spacing between minima spacing between successive stainless steel steel in brass stress successive minima theoretical and experimental Tpppp transducer tungsten and stainless typical amplitude-time records values various pulses vector W.G. Neubauer wave equation wave speed ratio Y.H. Pao