Fracture Behavior of Wood Under Mode I Loading in Tangential Direction

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

Drvna Industrija Pub Date : 2022-11-15 DOI:10.5552/drvind.2022.2135

Arif Caglar Konukcu

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引用次数: 0

Abstract

The aim of this study was to determine the fracture behavior of southern yellow pine (Pinus taeda L.) and red oak (Quercus falcata) wood under mode I loading in the tangential-radial and tangential-longitudinal crack propagation systems by a compact tension test method. The results of the study indicated that, in general, red oak had a significantly different fracture behavior than southern yellow pine for each of the two crack propagation systems. The fracture toughness was higher in the tangential-radial crack propagation system than that in the tangential-longitudinal crack system, but there was no significant difference between the two crack propagation systems for southern yellow pine. The specific fracture energy of the tangential-longitudinal crack propagation system for both wood species was significantly lower than that of the tangential-radial crack propagation system. It means that more energy per unit area for the tangential-radial crack propagation system was needed to separate a wood sample into two halves. The difference in the fracture behavior of wood by the crack propagation system can be explained by the structural features of the tested samples since the crack propagation of the tangentialradial system crosses the annual ring and wood fibers can bridge the crack surface.

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木材在切向I型载荷作用下的断裂行为

本研究的目的是通过紧凑的拉伸试验方法，确定南黄松（Pinus taeda L.）和红栎（Quercus falcata）木材在切向径向和切向纵向裂纹扩展系统中在模式I载荷下的断裂行为。研究结果表明，总的来说，对于两个裂纹扩展系统中的每一个，红橡树的断裂行为都与南黄松明显不同。切向径向裂纹扩展系统的断裂韧性高于切向纵向裂纹扩展系统，但两种裂纹扩展系统对南方黄松的断裂韧性没有显著差异。两种木材的切向纵向裂纹扩展系统的比断裂能均显著低于切向径向裂纹扩展系统。这意味着，切向径向裂纹扩展系统需要更多的单位面积能量才能将木材样品分成两半。裂纹扩展系统对木材断裂行为的影响可以用试样的结构特征来解释，因为切向径向系统的裂纹扩展穿过年轮，木材纤维可以桥接裂纹表面。

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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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.