Study on the strength mechanism of the wooden round-end mortise-and-tenon joint using the digital image correlation method

IF 2.2 3区农林科学 Q2 FORESTRY

Holzforschung Pub Date : 2024-07-17 DOI:10.1515/hf-2024-0029

Wengang Hu, Runzhong Yu

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引用次数: 0

Abstract

The aim of this study was to reveal the strength mechanism of the mortise-and-tenon (M–T) joint at a deeper level. The effects of tenon fit on bending and withdrawal load resistances, and strain distributions outside and inside beech (Fagus sylvatica) wooden round-end M–T joints were experimentally investigated using mechanical testing synchronizing digital image correlation method (DICM). The results showed that (1) the tenon fit had greater significance on withdrawal properties than that of bending properties of M–T joints; (2) the bending load resistance was linearly proportional to withdrawal load resistance based on both theoretic analysis and regression methods; (3) strain distributions outside M–T joints during the loading process were not sufficient to evaluate the mechanical behaviors of the M–T joint; (4) strain distributions inside M–T joints showed that the maximum strains on top and bottom parts of the tenon were significantly greater than that of middle part, but the difference decreased with the growth of tenon fit; (5) the method of determining the optimal tenon fit of the M–T joint based on the DICM was proposed, and optimal tenon fit of beech wooden round-end M–T joint evaluated ranged from 0.4 to 0.5 mm.

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利用数字图像关联法研究木制圆端榫接合的强度机理

本研究旨在从更深层次揭示榫卯（M-T）连接的强度机理。采用机械测试同步数字图像相关法（DICM），实验研究了榫头配合对抗弯和抗拔载荷的影响，以及山毛榉（Fagus sylvatica）木制圆端 M-T 接头外部和内部的应变分布。结果表明：(1) 榫合对 M-T 接头抽出性能的影响大于弯曲性能；(2) 根据理论分析和回归方法，抗弯曲载荷与抽出载荷成线性比例；(3) 加载过程中 M-T 接头外部的应变分布不足以评价 M-T 接头的力学行为；(4）M-T 接头内部的应变分布表明，榫头上部和下部的最大应变明显大于中间部分，但随着榫头配合度的增加，差异减小；（5）提出了基于 DICM 确定 M-T 接头最佳榫头配合度的方法，所评价的榉木圆端 M-T 接头最佳榫头配合度范围为 0.4 至 0.5 毫米。

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

Holzforschung 工程技术-材料科学：纸与木材

CiteScore

4.60

自引率

4.20%

发文量

审稿时长

3.3 months

期刊介绍： Holzforschung is an international scholarly journal that publishes cutting-edge research on the biology, chemistry, physics and technology of wood and wood components. High quality papers about biotechnology and tree genetics are also welcome. Rated year after year as one of the top scientific journals in the category of Pulp and Paper (ISI Journal Citation Index), Holzforschung represents innovative, high quality basic and applied research. The German title reflects the journal''s origins in a long scientific tradition, but all articles are published in English to stimulate and promote cooperation between experts all over the world. Ahead-of-print publishing ensures fastest possible knowledge transfer.