Analysis of effective elastic parameters of natural bamboo honeycomb cell structure

IF 3.1 2区农林科学 Q1 FORESTRY

Wood Science and Technology Pub Date : 2024-02-27 DOI:10.1007/s00226-024-01536-3

Minggong Yu, Zhangheng Wang, Xiawang Jiang, Le Gong, Ling Song, Delin Sun

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引用次数: 0

Abstract

Bamboo is an environmentally friendly building structural material. This work investigated the cavity structural characteristics and physical and mechanical properties of honeycomb sandwiches and natural bamboo in the longitudinal direction. The effective elastic parameters of periodically arranged hexagonal bamboo honeycomb cells under in-plane and out-of-plane loads were modeled using analytical and numerical approaches. Then, the effective elastic parameter model of bamboo honeycomb cells was validated by experiments and finite element analysis. The average errors between the calculated and experimental equivalent modulus of elasticity, Poisson’s ratio, and shear modulus in the three principal axis directions were 7.43, 4.37, and 8.68%, respectively. The average relativities between the model values of the elastic parameters of the bamboo honeycomb cell and the simulation results in the three directions were 5.46, 5.40, and 6.12%, respectively. The experimental and finite element analysis showed that the constructed effective elastic parameter model of the bamboo honeycomb cell better reflected the state of the bamboo core when subjected to force. This study provides insights for further research on the mechanical properties of bamboo materials and their application in bamboo-based lightweight and high-strength sandwich structures.

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天然竹蜂窝结构的有效弹性参数分析

竹子是一种环保的建筑结构材料。这项工作研究了蜂窝夹层和天然竹材在纵向上的空腔结构特征和物理机械性能。采用分析和数值方法对周期性排列的六边形竹蜂窝单元在平面内和平面外荷载作用下的有效弹性参数进行了建模。然后，通过实验和有限元分析验证了竹蜂窝单元的有效弹性参数模型。在三个主轴方向上，计算和实验的等效弹性模量、泊松比和剪切模量的平均误差分别为 7.43%、4.37% 和 8.68%。在三个方向上，竹蜂窝单元的弹性参数模型值与模拟结果之间的平均相对值分别为 5.46%、5.40% 和 6.12%。实验和有限元分析表明，构建的竹蜂窝有效弹性参数模型能更好地反映竹芯受力时的状态。本研究为进一步研究竹材料的力学性能及其在竹基轻质高强夹层结构中的应用提供了启示。

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来源期刊

Wood Science and Technology 工程技术-材料科学：纸与木材

CiteScore

5.90

自引率

5.90%

发文量

审稿时长

3 months

期刊介绍： Wood Science and Technology publishes original scientific research results and review papers covering the entire field of wood material science, wood components and wood based products. Subjects are wood biology and wood quality, wood physics and physical technologies, wood chemistry and chemical technologies. Latest advances in areas such as cell wall and wood formation; structural and chemical composition of wood and wood composites and their property relations; physical, mechanical and chemical characterization and relevant methodological developments, and microbiological degradation of wood and wood based products are reported. Topics related to wood technology include machining, gluing, and finishing, composite technology, wood modification, wood mechanics, creep and rheology, and the conversion of wood into pulp and biorefinery products.