含水率对云杉和橡木切削参数及断裂特性的影响

IF 0.7 4区农林科学 Q4 MATERIALS SCIENCE, PAPER & WOOD

Drvna Industrija Pub Date : 2022-07-15 DOI:10.5552/drvind.2022.0026

Luďka Hanincová, J. Procházka, V. Novák, Z. Kopecký

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引用次数: 1

摘要

本研究的目的是确定水分含量对云杉和橡树木材的切割参数和断裂特性的影响。挪威云杉(Picea abies (L.))样品(H. Karst.)和英国橡木(Quercus robur L.)干燥至所需含水量，然后在圆锯片机上进行可加工性试验。结果表明，在纤维饱和点(FSP)前，切削力和进给力随含水率的增加而增大。当含水率大于FSP时，切削力和进给力达到最小值。在实验的基础上，推导了断裂韧性和抗剪屈服强度。断裂韧性随含水率的增加而降低。断裂韧性的最小值是在FSP以上的含水率水平上实现的。剪切屈服强度随着含水率的增加而线性降低:与FSP含水率的样品相比，降低幅度高达17%。根据计算结果，讨论了含水率和木材种类对切割和断裂特性的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Influence of Moisture Content on Cutting Parameters and Fracture Characteristics of Spruce and Oak Wood

The objective of this study was to determine the effect of the moisture content on cutting parameters and fracture characteristics of spruce and oak wood. Samples of Norway spruce (Picea abies (L.) H. Karst.) and English oak (Quercus robur L.) were dried to required moisture content and then used for the machinability test on circular sawblade machine. Results indicate that cutting force and feed force increase with increasing moisture content up to the fiber saturation point (FSP). When the moisture content increases above the FSP, the minimum values of cutting and feed force are achieved. Based on performed experiments, the fracture toughness and shear yield strength were derived. Fracture toughness decreases with increasing moisture content. The minimum values of fracture toughness are achieved at the moisture content level above the FSP. Shear yield strength decreases linearly with increasing moisture content: the decrease is up to 17 % compared to samples with moisture content at the FSP. Based on calculated results, the influence of moisture content and wood species on cutting and fracture characteristics was discussed.

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来源期刊

Drvna Industrija MATERIALS SCIENCE, PAPER & WOOD-

CiteScore

1.80

自引率

9.10%

发文量

审稿时长

>12 weeks

期刊介绍： "Drvna industrija" ("Wood Industry") journal publishes original scientific and review papers, short notes, professional papers, conference papers, reports, professional information, bibliographical and survey articles and general notes relating to the forestry exploitation, biology, chemistry, physics and technology of wood, pulp and paper and wood components, including production, management and marketing aspects in the woodworking industry.