非对称纤维表面强化木材的静态弯曲特性研究

IF 2.4 2区农林科学 Q1 FORESTRY

Forests Pub Date : 2023-12-16 DOI:10.3390/f14122454

Xu Guo, Fengwei Zhou, Shuduan Deng, Chunlei Dong

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引用次数: 0

摘要

为了研究非对称增强对木材静曲性能的影响机理，本文测试分析了SPF木材和以SPF木材为基材，竹纤维和碳纤维为增强材料形成的七种不同类型的非对称纤维表面增强木材（AFRWC）的静曲性能。研究结果发现：（1）七种非对称纤维表面增强木材的断裂模量均有不同程度的增加，但静弯曲弹性模量有增有减；（2）非对称增强改变了木材在静弯曲时的截面应变分布和损伤类型；(3）截面应变场试验和 ABAQUS 有限元模拟结果表明，在压缩区和拉伸区分别粘结竹材和两层 CFRP 的非对称加固方法可大大提高木材的静弯曲性能。试样 MOR 和 MOE 的模拟值与测量值之间的误差分别仅为 -0.7% 和 -7.3%。这种不对称加固方式可以获得更合理的截面应力分布。

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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Study on the Static-Bending Properties of Surface-Reinforced Wood with Asymmetric Fibers

In order to investigate the mechanism of the effect of asymmetric reinforcement on the static-bending properties of wood, this paper tests and analyzes the static-bending properties of SPF wood and seven different types of asymmetric fiber surface-reinforced wood (AFRWC) formed by SPF wood as the substrate and bamboo and carbon fibers as the reinforcement materials. The results of the study found that (1) the moduli of rupture of the seven types of AFRWC were increased to varying degrees, but the static-bending moduli of elasticity increased or decreased; (2) the asymmetric reinforcement changed the cross-section strain distribution and damage type of the wood in static bending; (3) the results of the cross-section strain-field tests and the ABAQUS finite element simulation showed that the asymmetric reinforcement method of bonding the bamboo material and the two layers of CFRP in the compression and tensile zones, respectively, can greatly enhance the static-bending performance of the wood. The error between the simulated and measured values of specimens MOR and MOE is only −0.7% and −7.3%, respectively. This type of asymmetric reinforcement makes it possible to obtain a more reasonable cross-section stress distribution.

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来源期刊

Forests FORESTRY-

CiteScore

4.40

自引率

17.20%

发文量

1823

审稿时长

19.02 days

期刊介绍： Forests (ISSN 1999-4907) is an international and cross-disciplinary scholarly journal of forestry and forest ecology. It publishes research papers, short communications and review papers. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles.