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Compact shear specimen for wood mode II fracture investigations

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Abstract

A mode II fracture specimen has been developed from experimental and numerical investigation for applications with wood. Development centered on the compact shear specimen and addressed the extreme orthotropy of both the elastic and strength properties of wood. Mode II fracture toughness was assessed from test data gathered for southern pine and Douglas-fir specimens combined with use of quarter-point singular finite elements. Evidence is provided that this specimen is suitable for investigators to employ in fracture studies with highly orthotropic materials.

Résumé

On a développé une éprouvette d'essai de rupture en mode II à partir de recherches expérimentales et numériques en vue d'être appliquées au bois. On a focalisé le développement sur une éprouvette compacte de cisaillement, conçue de manière à mettre en valeur l'orthotropie extrême des propriétés élastiques et de la résistance du bois. On a établi la ténacité à la rupture sous mode II à partir de données d'essais sur des échantillons de pin méridional et de pin Douglas, combinées à une analyse par éléments finis à singularité quart-points. On montre à évidence que ce type d'éprouvette convient à des recherches sur la rupture de matériaux à orthotropie particulièrement élevée.

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Cramer, S.M., Pugel, A.D. Compact shear specimen for wood mode II fracture investigations. Int J Fract 35, 163–174 (1987). https://doi.org/10.1007/BF00015586

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  • DOI: https://doi.org/10.1007/BF00015586

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