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In-situ
observation
on the morphological behavior of bamboo under flexural stress with respect to its fiber-foam composite structure
Bioresources, 2019, Vol.13 (3), p.5472-5478
[Peer Reviewed Journal]
ISSN: 1930-2126 ;EISSN: 1930-2126 ;DOI: 10.15376/biores.13.3.5472-5478
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Title:
In-situ
observation
on the morphological behavior of bamboo under flexural stress with respect to its fiber-foam composite structure
Author:
Chen, Meiling
;
Fei, Benhua
Is Part Of:
Bioresources, 2019, Vol.13 (3), p.5472-5478
Description:
An in-situ
observation
on the morphological behavior of bamboo’s fiber-foam composite structure under flexural stress was conducted, and the respective contribution of parenchymatous tissues and sclerenchyma
fibers
to the flexural ductility of bamboo was evaluated.
Fibers
or parenchymatous cells at the bottom suffered tensile stress during bending process, where initial microcracks occurred. The results suggested that the bottom parenchymatous tissues experienced a perforative tear along the loading direction, while
fibers
continued to stretch until several fibrous tensile failure cracks were observed. The subsequent crack growth mode was similar to that of the horizontal crack transmission that began when it reached
fibers
or somewhere between
fibers
, until another weak load-bearing point appeared, and then it expanded up through parenchymatous tissues. As a whole, the crack acted ladder-like in its growth, and the propagation paths were not restricted to a coherent one. Images of the morphological changes of the upper parenchymatous tissues and sclerenchyma fibers, which suffered compressive stress during bending process, indicated that parenchymatous tissues and sclerenchyma fibers made different contributions to the flexural ductility of bamboo. Sclerenchyma fibers supplied deformation resistance for bamboo’s macroscopic deformation, while parenchymatous tissues offered deformation space due to the variation of cellular morphology and location.
Language:
English
Identifier:
ISSN: 1930-2126
EISSN: 1930-2126
DOI: 10.15376/biores.13.3.5472-5478
Source:
DOAJ Directory of Open Access Journals
Geneva Foundation Free Medical Journals at publisher websites
ROAD: Directory of Open Access Scholarly Resources
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