Vascular bundle shape in cross-section and relaxation properties of Moso bamboo (Phyllostachys pubescens)

Kanzawa, Eisuke; Aoyagi, Shoko; Nakano, Takato

doi:10.1016/j.msec.2011.03.004

Cited by 50 publications

(27 citation statements)

References 15 publications

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“…In particular, the closer the vascular bundle is to the stem center, the rounder the vascular bundle. This pattern is similar to the radial variation of bamboo vascular bundles [29].…”

Section: Shape Of Vascular Bundlessupporting

confidence: 76%

Anatomy of the Windmill Palm (Trachycarpus fortunei) and Its Application Potential

Zhu¹,

Wang

et al. 2019

Forests

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The windmill palm (Trachycarpus fortunei (Hook.) H. Wendl.) is widely distributed and is an important potential source of lignocellulosic materials. The lack of knowledge on the anatomy of the windmill palm has led to its inefficient use. In this paper, the diversity in vascular bundle types, shape, surface, and tissue proportions in the leaf sheaths and stems were studied with digital microscopy and scanning electron microscope (SEM). Simultaneously, fiber dimensions, fiber surfaces, cell wall ultrastructure, and micromechanics were studied with atomic force microscopy (AFM) and a nanoindenter. There is diversity among vascular bundles in stems and leaf sheaths. All vascular bundles in the stems are type B (circular vascular tissue (VT) at the edge of the fibrous sheath (FS)) while the leaf sheath vascular bundles mostly belong to type C (aliform (VT) at the center of the (FS), with the wings of the (VT) extending to the edge of the vascular bundles). In addition, variation among the vascular bundle area and tissue proportion in the radial direction of the stems and different layers of the leaf sheaths is also significant. Microscopically, the fibers in the stem are much wider and longer than that in the leaf sheath. The secondary walls of stem fibers are triple layered while those in the leaf sheath are double layered. The indentation modulus and hardness of the cell wall of leaf sheath fibers are higher than that of the stem. An independent sample t-test also showed a significant difference between stems and leaf sheaths. All this indicates that windmill palm stems and leaf sheaths are two different materials and have different application prospects.

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“…In particular, the closer the vascular bundle is to the stem center, the rounder the vascular bundle. This pattern is similar to the radial variation of bamboo vascular bundles [29].…”

Section: Shape Of Vascular Bundlessupporting

confidence: 76%

Anatomy of the Windmill Palm (Trachycarpus fortunei) and Its Application Potential

Zhu¹,

Wang

et al. 2019

Forests

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“…It affects directly the mechanical properties of the specimen due to these pores that act as stress concentrations. Kanzawa et al [27] proposed to measure the maximum width and length of the vascular bundles ( Figure 22). In this work, an average of 0.45 mm length and 0.38 mm width for thicker bamboo and 0.19 mm length and 0.14 mm width for thinner bamboo.…”

Section: Discussionmentioning

confidence: 99%

Structural Evaluation of Bamboo Bike Frames: Experimental and Numerical Analysis

Fierro¹,

Fierro²,

Suárez³

2020

Strength of Materials

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Construction of bicycles with bamboo frames has become an alternative to improve the quality of life of some communities, be friendly with the environment and be ecologically sustainable. However, the production of bike frames is made in an artisanal way and there are few antecedents that have proven their reliability. This work presents the evaluation and simulation of the mechanical behavior of bike frames made in bamboo. Three-points bending tests were performed using bamboo bars with similar dimensions to bike frames, and an equivalent elasticity modulus was determined and used as the input datum of a finite element model. A linear model material and beam elements were used to model the bike frame. Tests were performed using bike frames of bamboo applying loads greater than 7000 N, and the displacements were measured. The experimental displacements were used to calibrate the model, which consisted of modifying the rigidity of the connections until the displacements of the model fit near to 90%. The calibrated model was used for a fatigue simulation in order to predict the lifespan of the bike frame. Some technical values of bamboo bike frames were obtained so that these will allow them to define the technical characteristics of the product and guarantee their operating conditions.

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“…Wood and bamboo have characteristic relaxation behaviors, e.g., "mechano-sorptive behaviors" which is the peculiar relaxation behavior under changing moisture content and whose mechanism has not elucidated (Armstrong and Christensen, 1961;Gibson, 1965;Grossman, 1976). The relaxation properties of wood have been examined extensively, and those of bamboo recently, via microstructural analysis (Aoyagi and Nakano, 2009;Tsubaki and Nakano, 2010;Kanzawa et al, 2011).…”

Section: Application Of Ttsp To Wood As a Multi-phase Systemmentioning

confidence: 99%

Applicability condition of time–temperature superposition principle (TTSP) to a multi-phase system

Nakano

2012

Mech Time-Depend Mater

Self Cite

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The applicability condition of the time-temperature superposition principle (TTSP) to a multi-phase system is analytically discussed assuming a mixture law. It was concluded that the TTSP does not hold for a multi-phase system in general but does hold for a multi-component system in which some components have the same temperature dependence and the others have no temperature dependence. On the basis of the results, the application of the TTSP to plant materials such as wood and bamboo was examined using a mixture law and a stretched-exponential function having a characteristic relaxation time 0 τ and a stretching parameter β. Wood can be treated as a multi-phase system , where t and g T is a measurement time and the glass transition temperature, respectively

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Vascular bundle shape in cross-section and relaxation properties of Moso bamboo (Phyllostachys pubescens)

Cited by 50 publications

References 15 publications

Anatomy of the Windmill Palm (Trachycarpus fortunei) and Its Application Potential

Anatomy of the Windmill Palm (Trachycarpus fortunei) and Its Application Potential

Structural Evaluation of Bamboo Bike Frames: Experimental and Numerical Analysis

Applicability condition of time–temperature superposition principle (TTSP) to a multi-phase system

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