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一种速生材榫接合节点增强方法

胡文刚 白珏 关惠元

胡文刚, 白珏, 关惠元. 一种速生材榫接合节点增强方法[J]. 北京林业大学学报, 2017, 39(4): 101-107. doi: 10.13332/j.1000-1522.20160400
引用本文: 胡文刚, 白珏, 关惠元. 一种速生材榫接合节点增强方法[J]. 北京林业大学学报, 2017, 39(4): 101-107. doi: 10.13332/j.1000-1522.20160400
HU Wen-gang, BAI Jue, GUAN Hui-yuan. Investigation on a method of increasing mortise and tenon joint strength of a fast growing wood[J]. Journal of Beijing Forestry University, 2017, 39(4): 101-107. doi: 10.13332/j.1000-1522.20160400
Citation: HU Wen-gang, BAI Jue, GUAN Hui-yuan. Investigation on a method of increasing mortise and tenon joint strength of a fast growing wood[J]. Journal of Beijing Forestry University, 2017, 39(4): 101-107. doi: 10.13332/j.1000-1522.20160400

一种速生材榫接合节点增强方法

doi: 10.13332/j.1000-1522.20160400
基金项目: 

江苏省高校优势学科建设工程项目 PAPD

林业公益性行业科研专项 201204700202

详细信息
    作者简介:

    胡文刚,博士生。主要研究方向:家具设计及理论。Email:107318107@qq.com  地址: 210037  江苏省南京市玄武区龙蟠路159号南京林业大学家居与工业设计学院

    责任作者:

    关惠元,教授,博士生导师。主要研究方向:家具设计及理论、人体工程学、家具生产制造。Email:guanhuiyuan@njfu.edu.com  地址:同上

  • 中图分类号: TS664.1

Investigation on a method of increasing mortise and tenon joint strength of a fast growing wood

  • 摘要: 提出了一种基于硬木镶嵌的速生材榫接合节点增强方法。以速生杨木椭圆榫接合的T型构件为例,在杨木横向构件榫孔处嵌入材质较硬的榉木,并通过榉木椭圆插入榫将其与杨木竖向构件接合。首先,通过创新的测量方式对榉木在杨木横向构件中镶嵌的最佳配合参量进行了研究;然后,对榉木椭圆插入榫与杨木竖向构件接合的最佳配合参量进行了研究;最后,保持榫接合构件尺寸不变,采用最佳配合参量进行组装,探讨了榉木以不同纹理方向镶嵌时对椭圆榫接合节点抗拔力的影响,并将其与未经镶嵌的杨木整体式椭圆榫接合T型构件以及榉木整体式椭圆榫接合T型构件进行了对比分析。实验得出:榉木整体式椭圆榫接合(Ⅳ型节点)抗拔力为5 027 n,榉木顺纹镶嵌椭圆插入榫接合(Ⅲ型节点)抗拔力为4 242 n,榉木横纹镶嵌椭圆插入榫接合(Ⅱ型节点)抗拔力为3 775 n,杨木整体式椭圆榫接合(Ⅰ型节点)抗拔力为3 123 n,也就是抗拔力Ⅳ型节点>Ⅲ型节点>Ⅱ型节点>Ⅰ型节点。由实验结果可以得出如下结论:Ⅲ型节点的抗拔力比Ⅱ型节点提高了约12.4%,说明榉木镶嵌的纹理方向对节点强度有明显影响,且顺纹进行镶嵌效果更佳;Ⅲ型节点的抗拔力比Ⅰ型节点提高了约35.8%(约为1 119 n),说明在速生材榫接合构件中以顺纹方向嵌入硬质木材可以大幅增加节点抗拔力,进而为速生材直接应用于实木榫接合家具中提供了新方法。

     

  • 图  1  构件组装示意图

    1.杨木横向构件; 2.杨木竖向构件; 3.榉木镶嵌木块; 4.榉木榫头。

    Figure  1.  Schematic of specimen assemble

    1, poplar transverse component; 2, poplar vertical component; 3, embedded beech block; 4, beech tenon.

    图  2  横向试件尺寸

    单位:mm Unit: mm A.杨木横向构件; B.榉木镶嵌木块(a为过盈量,b为间隙量); C.组装示意图。

    Figure  2.  Scale of transverse specimens

    A, poplar transverse component; B, embedded beech block (a, interference fit amount; b, clearance fit amount); C, schematic diagram of assembly.

    图  3  镶嵌强度测量方法

    1.加载头; 2.试件; 3.固定支架; P.加载方向。

    Figure  3.  Testing method of embedded strength

    1, loading head; 2, specimen; 3, fixed support; P, load direction.

    图  4  竖向构件尺寸

    单位:mm Unit: mm A.杨木竖向构件; B.榉木榫头(a为过盈量,b为间隙量); C.组装示意图。

    Figure  4.  Scale of vertical specimens

    A, poplar vertical component; B, beech tenon (a, interference fit amount; b, clearance fit amount); C, schematic diagram of assembly.

    图  5  竖向构件强度测试方法

    1.加载端; 2.试件; 3.固定支架; P.加载方向。

    Figure  5.  Testing method of vertical specimens

    1, loading head; 2, specimen; 3, fixed support; P, load direction.

    图  6  椭圆插入榫接合试件尺寸

    单位:mm Unit: mm A.杨木横向构件; B.杨木竖向构件; C.榉木榫头(a为过盈量,b为间隙量); D.组装示意图。

    Figure  6.  Scale of oval loose tenon

    A, poplar transverse component; B, poplar vertical component; C, beech tenon (a, interference fit amount; b, clearance fit amount); D, schematic diagram of assembly.

    图  7  整体式榫接合试件尺寸

    单位:mm Unit: mm A.杨木横向构件; B.杨木竖向构件(a为过盈量,b为间隙量); C.组装示意图。

    Figure  7.  Scale of integral tenon

    A, poplar transverse component; B, poplar vertical component (a, interference fit amount; b, clearance fit amount); C, schematic diagram of assembly.

    图  8  T型试件抗拔力测试示意图

    1.加载端; 2.试件; 3.固定支架; P.加载方向。

    Figure  8.  Withdrawal force test method of T-shaped specimens

    1, loading head; 2, specimen; 3, fixed support; P, load direction.

    图  9  横向构件配合参量实验结果

    Figure  9.  Result of fitting parameters of the transverse component

    图  10  横向构件配合参量与抗拔力的响应曲面

    Figure  10.  Response surface of fitting parameters and withdrawal force of the transverse component

    图  11  竖向构件配合参量实验结果

    Figure  11.  Result of fitting parameters of the vertical component

    图  12  竖向构件配合参量与抗拔力响应曲面

    Figure  12.  Response surface of fitting parameters and withdrawal force of the vertical component

    图  13  对比实验结果

    Figure  13.  Comparison in experiment results

    图  14  节点的破坏形式

    Figure  14.  Destroying type of joint

    图  15  Ⅱ型与Ⅲ型节点破坏原理示意图

    1.榫头; 2.榉木镶嵌木块; 3.榫孔; P.加载方向; A.Ⅱ型节点; B.Ⅲ型节点。

    Figure  15.  Destroy schematic diagram of type Ⅱ and Ⅲ joints

    1, tenon; 2, embedded beech block; 3, mortise; P, load direction; A, type Ⅱ joint; B, type Ⅲ joint.

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出版历程
  • 收稿日期:  2016-12-08
  • 修回日期:  2017-03-18
  • 刊出日期:  2017-04-01

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