THE EMISSION OF RAYLEIGH WAVES FROM BRITTLE FRACTURE INITIATION, AND THE POSSIBLE EFFECT OF THE REFLECTED WAVES ON CRACK ARREST

Autor:	C. Thaulow, W. Burget
Rok vydání:	1990
Předmět:	Materials science business.industry Mechanical Engineering Reflected waves Structural engineering Mechanics Condensed Matter Physics Crack closure symbols.namesake Stress wave Acoustic emission Mechanics of Materials symbols General Materials Science Rayleigh wave business Brittle fracture
Zdroj:	Fatigue & Fracture of Engineering Materials and Structures. 13:327-346
ISSN:	1460-2695 8756-758X
DOI:	10.1111/j.1460-2695.1990.tb00605.x
Popis:	— The pop-in initiation and arrest behaviour in weldments of a structural steel, have been characterized with acoustic emission measurements. It was found that strong Rayleigh waves radiate from the crack tip in a preferred direction. Literature examinations and reanalysis of previous crack arrest test results, clearly indicate that the Rayleigh waves will be reflected back from edges on the crack surface and cause a crack closure effect upon arrival at the running crack tip. The phenomenon is tentatively called AUTOARREST (automatic arrest caused by release of stress waves from the crack itself).
Databáze:	OpenAIRE
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