The attenuation evolution near notch tips in polymers by the NDT method of ultrasounds

The influence of singularities on the evolution of ultrasound attenuation for materials was studied experimentally. The specimens used were made of plexiglas. They were prismatic with or without an edge crack, normal to the edge, or a V-shaped notch. The specimens were loaded in tension gradually un...

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Veröffentlicht in:Engineering fracture mechanics 1992-09, Vol.43 (1), p.117-121
Hauptverfasser: Prassianakis, J.N., Theotokoglou, E.N.
Format: Artikel
Sprache:eng
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Zusammenfassung:The influence of singularities on the evolution of ultrasound attenuation for materials was studied experimentally. The specimens used were made of plexiglas. They were prismatic with or without an edge crack, normal to the edge, or a V-shaped notch. The specimens were loaded in tension gradually until fracture. The load level and the degree of the singularity correlated experimentally to the degree of ultrasound attenuation. An ultrasonic pulse echo signal was used to investigate and measure the degree of attenuation, for the ultrasonic stress wave propagating through the stressed specimens.
ISSN:0013-7944
1873-7315
DOI:10.1016/0013-7944(92)90318-9