Abstract
The broad range detection of incipient failure in structural, mechanical, hydraulic, pneumatic, electrical, and electronic systems is based upon the detection of the two basic causes of failure. These causes are structural degradation and chemical contamination occurring in the structure of the material of which the systems listed above are composed. The detection of incipient failure allows maintenance to be programmed at the convenience of the user, thus preventing down time of equipment during use periods. The acoustic emission phenomena are employed in the detection of incipient failure in all types of equipment covered in this report. Specifically, the examples chosen are structural, mechanical, pneumatic and hydraulic components, subassemblies, or specimens as applicable. From these examples the broad range incipient failure detection concept based on the acoustic emission phenomena is developed. The experiments covered include detection of incipient failure in bearings, hydraulic assemblies, pneumatic subsystems, stress corrosion in aluminum, ductile tensile failures in carbon steel, 4330M steel, and in boron-epoxy composite material.
Published Version
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