利用计算机视觉和机械模拟分析竹秆结构

IF 2.2 3区 农林科学 Q2 FORESTRY Holzforschung Pub Date : 2023-12-27 DOI:10.1515/hf-2023-0093
Fukuan Dai, Yuxuan Chen, Wenfu Zhang, Tuhua Zhong, Genlin Tian, Hankun Wang
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引用次数: 0

摘要

竹秆是一种天然材料,其径向维管束结构分级,轴向竹节分布规则。为了研究竹秆结构对自然环境的适应性,我们利用维管束识别模型对竹秆结构进行了分析,并辅以力学模拟。结果表明,竹子从基部到顶部的宏观尺寸特征有一定的规律:外径线性减小;节间长度先增加后减小;长径比逐渐增大;壁腔比先减小后增大。在外力作用下,竹子表现出很强的稳定性,这与竹壁薄且中空以及竹节呈抛物线分布有关。沿轴向,维管束数量呈线性减少,而纤维鞘组织比率和维管束分布频率则从基部向顶部增加。在径向上,维管束的长度和面积呈先增加后减少的趋势,而宽度则呈增加的趋势,导致长宽比减小。总体而言,维管束的径向变化规律在不同高度上表现出不明显的变化。
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Analyzing the structure of bamboo culms using computer vision and mechanical simulation
Bamboo culm is a natural material characterized by a graded structure of vascular bundles in the radial direction and a regular distribution of bamboo nodes in the axial direction. To investigate the adaptation of bamboo culm structure to its natural environment, the bamboo culm structure was analyzed using a vascular bundle identification model, complemented by mechanical simulations. The results showed a certain pattern in the macroscopic dimensional characteristics of bamboo from the base to the top: the outer diameter decreased linearly; the internode length initially increased before decreasing; the length-to-diameter ratio gradually increased; and the wall-to-cavity ratio initially decreased before increasing. In response to external forces, bamboo exhibited strong stability, which was attributed to the thin and hollow wall as well as parabolic distribution of bamboo nodes. Along the axial direction, vascular bundle numbers linearly decreased, while the ratio of fiber sheath tissue and the distribution frequency of vascular bundles increased from the base to the top. In the radial direction, the length and area of vascular bundles tended to increase before decreasing, while the width tended to increase, leading to a decreasing length-to-width ratio. Overall, the radial variation pattern of vascular bundles showed nonsignificant variations at different heights.
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来源期刊
Holzforschung
Holzforschung 工程技术-材料科学:纸与木材
CiteScore
4.60
自引率
4.20%
发文量
83
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.
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