Author(s): C. Mckenziel; P. J. Langhorne; T. G. Haskell
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Keywords: No Keywords
Abstract: Analysis of acoustic emissions is an important tool in the non-destructive testing of materials. Experiments are described in which a four transducer array was used to locate the sources of acoustic emissions during the fracture of cantilever beams of Antarctic land-fast sea ice. Crack propagation was examined when the beam failed in tension at the upper ice surface (ie "push down" to failure), and this was compared with results for compression at the upper ice surface (ie "pull up" to failure). Significant differences were found between the two situations, implying that the acoustic emissions observed were the result of tensile fractures in both cases. The errors inherent in source location are discussed.
Year: 2000