Influence of section and moisture content on the tensile strength parallel to fibers of bamboo culms woody material

Luiz Henrique Marra Da Silva Ribeiro,Luiz Alberto Beijo,Ewerton Augusto De Souza Nogueira,José Felipe Dias,Lucas Misael De Aguiar

doi:10.1590/1983-40632019v4953562

Luiz Henrique Marra Da Silva Ribeiro, Luiz Alberto Beijo + Show 3 more

Open Access

https://doi.org/10.1590/1983-40632019v4953562

Copy DOI

Abstract

ABSTRACT Bamboo is an abundant plant in tropical regions, which can be used as a nonconventional structural material; however, there is a high variability in its mechanical properties. This study aimed to evaluate the influence of the moisture content and of the sections (with and without node) on the tensile strength parallel to the culm fibers of three bamboo species (Dendrocalamus asper, Phyllostachys pubescens and Phyllostachys aurea), aiming at their use for structural purposes. For each moisture condition (ambient, saturated in water, oven dried and control), a completely randomized design, following a 3 x 2 factorial scheme, was used. Phyllostachys pubescens exhibited a higher tensile strength parallel to the fibers than the other species. In general, the node affected negatively the tensile strength parallel to the fibers for all analyzed conditions, while the moisture content did not show a significant influence, although the descriptive analysis exhibited its influence on the dimensional variations and water absorption.

Highlights

Bamboo fibers can be used in structural areas, with or without the reinforcement of matrix types such as soil and cement composite (Ghavami 1995 and 2005)
There are several advantages in using bamboo as a material for structural purposes: the maximum growth of a culm in an adult vegetative clump is achieved on a short period of time, usually between one and six months (Beraldo 2003, Wakchaure & Kute 2012); the maximum mechanical strength is reached in a few years, commonly between three and six years; it is highly available in tropical and subtropical regions (Beraldo 2003, Ghavami 2005, Wakchaure & Kute 2012); the energy required to obtain bamboo, by volume, is much smaller than for steel (Beraldo 2003, Ghavami 2005); the specific resistance, which is the material tensile strength
This study aimed to evaluate the influence of the internal moisture content and of the node presence on the tensile strength parallel to the fibers of D. asper, P. pubescens and P. aurea culms

Summary

Introduction

Bamboo fibers can be used in structural areas, with or without the reinforcement of matrix types such as soil and cement composite (Ghavami 1995 and 2005). There are several advantages in using bamboo as a material for structural purposes: the maximum growth of a culm in an adult vegetative clump is achieved on a short period of time, usually between one and six months (Beraldo 2003, Wakchaure & Kute 2012); the maximum mechanical strength is reached in a few years, commonly between three and six years; it is highly available in tropical and subtropical regions (Beraldo 2003, Ghavami 2005, Wakchaure & Kute 2012); the energy required to obtain bamboo, by volume, is much smaller than for steel (Beraldo 2003, Ghavami 2005); the specific resistance, which is the material tensile strength.

Objectives

Methods

Results