Results 251 to 260 of about 939,024 (297)

Partial transparency of compressed wood

AIP Conference Proceedings, 2016
We have developed novel wood composite with optical transparency at arbitrary region. Pores in wood cells have a great variation in size. These pores expand the light path in the sample, because the refractive indexes differ between constituents of cell and air in lumen. In this study, wood compressed to close to lumen had optical transparency. Because
Hiroyuki Sugimoto, Masatoshi Sugimori
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"WOOD MODEL" for the dynamic behaviour of wood in multiaxial compression

Holz als Roh- und Werkstoff, 2002
The use of wood as a shock absorber in containers for radioactive materials and the need of designers for good quality mechanical characteristics had lead us to investigate the behaviour of wood under multiaxial dynamic compression. This paper presents the main experimental results of the static and dynamic compression we performed on small samples of ...
C. Adalian, P. Morlier
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Formation and function of compression wood in gymnosperms

The Botanical Review, 1965
Westing, Arthur H. (Middlebury Coll., Vt.). 1965.Formation and function of compression wood in gymnosperms. Bot. Rev. 31: 381–480 A review with ca. 575 references. The world literature pertaining to the biology of compression wood (Rotholz; reaction wood) is evaluated critically.
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Behavior of Wood in Transverse Compression

Journal of Testing and Evaluation, 1994
Abstract A finite element analysis program exists to evaluate the stress distribution in wood members subjected to perpendicular-to-grain (transverse) compression. In this study, the program was used to perform parameter studies to evaluate the effects of key variables on the distribution of stresses and the maximum stress concentrations
PJ Pellicane, J Bodig, AL Mrema
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Modeling Wood in Transverse Compression

Journal of Testing and Evaluation, 1994
Abstract A plane-stress, Finite element model has been developed to predict the stress distribution in wood members subject to perpendicular-to-grain compression. This model exploits linearstrain, isoparametric triangular elements used in sufficient number to achieve a convergent solution.
PJ Pellicane, J Bodig, AL Mrema
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Detection and Grading of Compression Wood

2013
The motivations to detect and identify compression wood are manifold and so are the demands on a proper solution of this problem. At present, biological detection and classification offer the most detailed grading of compression wood against normal wood, while visual inspection enables fast detection of compression wood in its spatial orientation on ...
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Nature of Compression Failure in Wood

Journal of the Structural Division, 1967
Inelasticity of wood in compression is started by buckling of the external fibers of the material. These fibers are laterally supported by the adjacent internal fibers and may be considered miniature Euler columns of unknown length. The fiber-column failure stress is derived using energy methods.
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Formation and Structure of Compression Wood

2013
Compression wood is a hard, dark-coloured wood typically found on the lower side of leaning stems and branches in conifers, Taxus and Ginkgo. This reaction wood is the result of the geotropic response of the tree, usually resulting from stem lean or the effect of stem flexing caused by wind.
L. A. Donaldson, A. P. Singh
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Compression Wood Records Hurricane

Journal of Forestry, 1931
Abstract Compression wood causes many difficulties in those boards in which it is present. Its exact cause remains in doubt; any new suggestion, as the present one, therefore throws light upon its probable origin.
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Deciphering the linkage type and structural characteristics of the p-hydroxyphenyl unit in Pinus massoniana Lamb compressed wood lignin

International Journal of Biological Macromolecules, 2022
Shuangfei Wang, Liming Zhang, Douyong Min   +2 more
exaly