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"""F4F Wildcat stroll round
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15) where cl and cs are the longitudinal and shear wave velocities, respectively. 6. The transducer is a longitudinal type (Olympus V109-RB) connected to an Olympus 5077PR square wave pulser/receiver. A digital storage oscilloscope captures the waveform. It can be seen that the pulse reflects back and forth from the surface of the sample, and as it does so, the magnitude drops. The time between each pulse is the time for the wave to transit twice the thickness of the sample. 6 Longitudinal wave transmission through a silicon carbide target.
The reason for this is that strength properties are dominated at the microstructural level, which is affected by processing, whereas the stiffness is very much affected by changes at the atomic scale. 5 Strength The theoretical strength that can be achieved by a material is defined by the elastic modulus, the inter-atomic spacing and the energy required to create a fracture surface – that is, the fracture surface energy. 17) � a0 �� where E is the elastic modulus, γ is the fracture surface energy and a0 is the inter-atomic spacing.
Gray III et al. 1994) (Johnson and Cook 1983) (Gray III et al. 1994) (Meyer, Jr. and Kleponis 2001) (Johnson and Cook 1983) (Johnson and Cook 1983) (Gray III et al. 1994) (Johnson and Holmquist 1989; Gray III et al. 900 1783 1783 The plate was obtained directly from the manufacturing line for the Bradley infantry fighting vehicle. For ceramic materials, it is generally accepted that their strength is relatively insensitive to strain rate until around 102/s–103/s is reached. At this point, the strength of the ceramic becomes highly strain-rate sensitive.
