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- Title
Proportional limit of wood obtained from a load-time diagram during an impact bending test.
- Authors
Kubojima, Yoshitaka; Kato, Hideo; Tonosaki, Mario
- Abstract
We transferred the linear part of a load-deflection diagram from an impact bending test of wood into a load-time diagram. In addition, we proposed a method to obtain the proportional limit from the load-time diagram. Japanese cedar ( Cryptomeria japonica D. Don), hondo spruce ( Picea yezoensis Carr. var. hondoensis Rehd.), hiba arbor-vitae ( Thujopsis dolabrata Sieb. et Zucc.), Japanese red pine ( Pinus densiflora Sieb. et Zucc.), paulownia (Paulownia tomentosa Steud.), Manchurian ash ( Fraxinus mandshurica Rupr.), and Japanese evergreen oak ( Quercus acuta Thunb.) were used in this study. The dimensions of each specimen were 115mm (L) * 7mm (R) * 7mm (T). The results were as follows: (1) The linear region of the load-deflection diagram in the impact bending test could be transferred with sufficient accuracy to a load-time diagram using a sine function. (2) Approximating the load-time diagram by a linear equation was useful for obtaining the proportional limit.
- Publication
Journal of Wood Science, 2002, Vol 48, Issue 6, p527
- ISSN
1435-0211
- Publication type
Article
- DOI
10.1007/BF00766651