Visualization of stress and deformation with use of AE
2005
Michal Černý | Pavel Mazal | Josef Filípek
The work is focused on the use of acoustic emission (AE) in technical practice. AE is a relatively new non-destructive experiment method, which is broadly developing mainly at the end of 20th and beginning of 21st century. The aim of the work is to monitor stress and strain initiation area until yield point. The yield point is a final stress-strain limit for machine parts application. Actual σ – ε state should be detected by material acoustic response. It enables determining of machine usable life. Uniaxial tensile test has been performed to achieve this goal. By use of AE method, the whole A2 screw deformation, all the way to breakdown, has been observed. The record from AE has been compared with force-time (F – t) record. In order of completeness the record has been also compared with another screw types – ČSN 021143.50. The comparison clearly confirmed the conclusion about acoustic activity in connecting element – screw.
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