THE FRACTURE-TOUGHNESS OF SPRUCE AND THE ESSENTIAL INFLUENCES - INVESTIGATIONS FOR MODE-2

THE FRACTURE-TOUGHNESS OF SPRUCE AND THE ESSENTIAL INFLUENCES - INVESTIGATIONS FOR MODE-2

The characteristic of beams with rectangular blockouts and break-throughs is the high stress state in the sharp notches. To estimate the bearing capacity based on the K-concept the knowledge of the fracture toughness for mode-1 (tension transverse to the grain) and for mode-2 (shear) is necessary. T...

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Veröffentlicht in:European journal of wood and wood products 1992-03, Vol.50 (3), p.117-121
Hauptverfasser: LOGEMANN, M, SCHELLING, W
Format: Artikel
Sprache:ger
Schlagworte:
Materials Science
Materials Science, Paper & Wood
Science & Technology
Technology
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Zusammenfassung:The characteristic of beams with rectangular blockouts and break-throughs is the high stress state in the sharp notches. To estimate the bearing capacity based on the K-concept the knowledge of the fracture toughness for mode-1 (tension transverse to the grain) and for mode-2 (shear) is necessary. The fracture toughness of spruce in the mode-2 is determined by using the beam-specimen. The essential influences are the density and the orientation of the annual rings in the notch.
ISSN:0018-3768
DOI:10.1007/BF02628685