Abstract
After an introduction into design concepts of composites, this paper presents a survey of material characterization investigations of a variety of composites ranging from graphite/epoxy, to metal-matrix, to carbon/carbon to CF/PEEK, and to biological material such as plant cell walls. Discussed are the results of a series of studies in anecdotal form, which include the characterization of soft-body impacts with gelatin projectiles as simulation due to bird strike, the healing of impact damage as imaged and followed by increasing temperature (5000 °C) in acoustic microscopy, finite element simulations of embedded piezoelectric element transducers, acoustic shear velocity measurements during the curing of graphite/epoxy; acoustic emissions during carbonization of carbon/carbon by the use of guided wave techniques inside an autoclave; and acoustic microscopy imaging in the characterization of metal-matrix composites. Always a factor is the resolution requirement. At the extreme end of the resolution capabili...
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