| 1. |
- Ashby, M.F., et al.
(författare)
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The fracture and toughness of woods
- 1985
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Ingår i: Proceedings of The Royal Society of London. Series A, Mathematical and physical sciences. - : The Royal Society. - 0080-4630. ; 398:1815, s. 261-280
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Tidskriftsartikel (refereegranskat)abstract
- Crack propagation in various woods has been examined by scanning electron microscopy, and the observations related to measurements of fracture toughness. It is found that the toughness is related in a simple way to the density of the wood, which is explained by a straightforward model. The apparent fracture toughness of wood for cracks that lie normal to the grain is larger, by a factor of about 10, than that for cracks which propagate parallel to the grain. This difference can be explained in terms of the fracture mechanics of very anisotropic solids
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| 2. |
- Easterling, K.E., et al.
(författare)
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On the mechanics of balsa and other woods
- 1982
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Ingår i: Proceedings of The Royal Society of London. Series A, Mathematical and physical sciences. - : The Royal Society. - 0080-4630. ; 383:1784, s. 31-41
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Tidskriftsartikel (refereegranskat)abstract
- The structure of balsa wood has been characterized by scanning microscopy. The moduli and crushing strengths of the wood, in three orthogonal directions, have been related to the structure and its reponse to load: during deformation the cell walls bend elastically and collapse plastically or by fracture. It is found that the moduli, crushing strengths and anisotropy of balsa and of other wood are determined, in part, by the properties of the cell-wall material, and, in part, by the dimensions and shape of the cells themselves.
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