caa a22 4500 463216954 CHVBK 20180405153159.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s00226-006-0091-8 doi (NATIONALLICENCE)springer-10.1007/s00226-006-0091-8 Bending and shear properties of compressed Sitka spruce [Elektronische Daten] [Hiroshi Yoshihara, Shogo Tsunematsu] We examined the bending and shear properties of compressed wood using small and clear specimens of Sitka spruce (Picea sitchensis Carr.). For measuring the bending properties, three-point bending tests were conducted under the span/depth ratio of 14, which is standardized in the American Society for Testing and Materials [ASTM D143-94 (2005a)] and Japanese Industrial Standards [JIS Z2101-94 (1994)]. In the bending test, the load, deflection at the midspan, and strain at the bottom of the midspan were simultaneously measured, and Young's modulus and bending strength were obtained by elementary beam theory. For obtaining the shear modulus and shear strength, asymmetric four-point bending tests were conducted using the specimens with rectangular and side-grooved cross sections, respectively, and the influence of the compression ratio on the shear properties was examined. The results are summarized as follows: (1) Young's modulus increased with increasing compression ratio when it was determined by the load-strain relation. Nevertheless, this tendency was rather obscured when Young's modulus was determined by the load-deflection relation. Hence, it is preferable that Young's modulus is measured from the load-strain relation. (2) The shear modulus in the longitudinal-tangential plane was maximum at the compression ratio of 50%, whereas that in the longitudinal-radial plane was minimum at the compression ratio of 50%. (3) The influence of the compression on the bending and shear strength ratio was not significant. Springer-Verlag, 2006 Yoshihara Hiroshi Faculty of Science and Engineering, Shimane University, Nishikawazu-cho 1060, Matsue, 690-8504, Shimane, Japan aut Tsunematsu Shogo Faculty of Science and Engineering, Shimane University, Nishikawazu-cho 1060, Matsue, 690-8504, Shimane, Japan aut Wood Science and Technology Springer-Verlag 41/2(2007-02-01), 117-131 0043-7719 41:2<117 2007 41 226 https://doi.org/10.1007/s00226-006-0091-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00226-006-0091-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yoshihara Hiroshi Faculty of Science and Engineering, Shimane University, Nishikawazu-cho 1060, Matsue, 690-8504, Shimane, Japan aut NATIONALLICENCE 700 1- Tsunematsu Shogo Faculty of Science and Engineering, Shimane University, Nishikawazu-cho 1060, Matsue, 690-8504, Shimane, Japan aut NATIONALLICENCE 773 0- Wood Science and Technology Springer-Verlag 41/2(2007-02-01), 117-131 0043-7719 41:2<117 2007 41 226 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer