THE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL  COMPRESSION

Aleksey Platonov; Aleksandra V. Kiseleva; Svetlana N. Snegireva

doi:10.34220/2308-8877-2020-8-1-218-222

UDC 63

THE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL COMPRESSION

Published in Actual directions of scientific researches of the XXI century: theory and practice · Volume 8, Issue 1 · Pages 218–222 · Rubric: MODERN TECHNOLOGIES OF SAWMILLING, WOODWORKING AND FURNITURE PRODUCTION

DOI: https://doi.org/10.34220/2308-8877-2020-8-1-218-222

Received: 14.09.2020 Accepted: 24.03.2024

Authors

Aleksey Platonov

Aleksandra V. Kiseleva

Svetlana N. Snegireva

Aleksey Platonov

Academic degree: doctor of technical sciences

Science rang: professor

Voronezh State University of Forestry and Technologies named after G.F. Morozov zaveduyuschiy kafedroy · kafedra drevesinovedeniya · Voronezh

Aleksandra V. Kiseleva

Academic degree: candidate of technical sciences

Voronezh State University of Forestry and Technologies named after G.F. Morozov docent · kafedra drevesinovedeniya · Voronezh

Svetlana N. Snegireva

Academic degree: candidate of sciences in biology

Voronezh State University of Forestry and Technologies named after G.F. Morozov docent · kafedra drevesinovedeniya · Voronezh

ABSTRACT

Currently, stocks of hardwoods in the Russian Federation are severely depleted and there is a shortage of raw materials on the market. One solution to this problem is the possibility of replacing hardwoods with pressed wood obtained from softwoods. As a result of the performed study, the change in the layer-by-layer density in the thickness of blanks made of pressed wood was found. The variation of density in the thickness of the workpiece depends on the moisture content of the wood at the time of pressing. At a humidity of 15 %, the wood is more compacted in the Central part than on the surface of the workpiece. When the humidity corresponds to the saturation limit of the cell walls of 30 %, the wood on the contrary is less compacted in the Central part, as well as on the surface of the samples. It was found that with the same average density of blanks made of pressed wood, the difference between the densest and less dense parts of the workpiece averaged 7.6-10.1 %. Based on these data, it is possible to obtain pressed wood with a given density distribution over the thickness of the workpieces. The results of the experiments will be useful in obtaining pressed wood with specified quality indicators, as well as in the manufacture of various structural elements and components from pressed wood.

KEYWORDS

прессованная древесина, плотность, береза, одноосное прессование, влажность.

Text

ВВЕДЕНИЕ

Древесина - это продукт биологического происхождения, у которого основным показателем качества материала, является её плотность [1].

Прессование древесины повышает её плотность – основной показатель качества материала [2, 3]. При прессовании повышается прочность, упругость, износостойкость древесины по сравнению с исходным сырьем до прессования. Прессованная древесина может быть получена из малоценной, низкосортной древесины. По физико-механическим свойствам прессованная древесина является полноценным заменителем древесины твердых пород [4, 5].

Качество и долговечность изделий из прессованной древесины во многом зависит от однородности её эксплуатационных показателей. Исследованию влияния термовлажностной обработки на свойства натуральной и прессованной древесины посвящено ряд работ [6, 7, 8]. Вопросы влияния влажности древесины на однородность качественных показателей прессованной древесины изучены недостаточно. Поэтому получение прессованной древесины с заданными показателями качества является актуальной задачей.

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8. Ren Li, Zhiqiang Gao, Shanghuan Feng, Jianmin Chang, Yanmei Wu, Rongfeng Huang (2018) Effects of preheating temperatures on the formation of sandwich compression and density distribution in the compressed wood. Journal of Wood Science. pp. 1-7.

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GOST

Platonov A. D., Kiseleva A. V., Snegireva S. N. THE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL COMPRESSION // Actual directions of scientific researches of the XXI century: theory and practice. 2020. no. 1. pp. 218-222. DOI: https://doi.org/10.34220/2308-8877-2020-8-1-218-222. (Date of access 29.10.2026).

MLA

Aleksey Platonov, Kiseleva A. V., Snegireva S. N.. "THE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL COMPRESSION." Actual directions of scientific researches of the XXI century: theory and practice 8.1 (2020): 218-222. DOI: https://doi.org/10.34220/2308-8877-2020-8-1-218-222.

APA

Platonov A. D., Kiseleva A. V., Snegireva S. N. (2020). THE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL COMPRESSION. Actual directions of scientific researches of the XXI century: theory and practice, 8(1), 218-222. https://doi.org/10.34220/2308-8877-2020-8-1-218-222

Chicago

Aleksey Platonov, Kiseleva A. V., Snegireva S. N.. "THE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL COMPRESSION." Actual directions of scientific researches of the XXI century: theory and practice 8, no. 1 (2020): 218-222. https://doi.org/10.34220/2308-8877-2020-8-1-218-222.

WIKI

{{cite journal | author = Platonov A. D., Kiseleva A. V., Snegireva S. N. | title = THE LAYER-BY-LAYER VARIATION OF WOOD DENSITY UNDER UNIAXIAL COMPRESSION | journal = Actual directions of scientific researches of the XXI century: theory and practice | year = 2020 | volume = 8 | issue = 1 | pages = 218-222 | doi = 10.34220/2308-8877-2020-8-1-218-222 }}

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