Godina, M;
Lorenzo, R;
(2015)
Calibrating a composite material model for analysis and design of bamboo structures.
In:
10th World Bamboo Congress [Proceedings: Volume 1].
(pp. pp. 201-209).
World Bamboo Organization
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Abstract
This paper proposes a methodology to develop a material model for bamboo culms to use it in a more rigorous structural analysis and design. The study presented here is part of a broader research with the aim of exploiting the mechanical properties of bamboo in lightweight structures that may transfer predominantly axial compressive forces. The methodology is based on theoretical analysis and experimental tests. Composite material theory has been adopted to describe the mathematical model that can realistically reproduce the behaviour of bamboo culms. The composite material model is linear elastic and describes the axial and flexural stiffness, and the stress distribution across the culm wall thickness. For this study a series of experimental tests of the bamboo species Moso (Phyllostachys Pubescens) were devised to obtain the Modulus of Elasticity � under axial compressive loads. Establishing suitable test methods to determine material properties is not an easy task due to the difficulty of working with a non-isotropic and variable material. Experimental tests were based on two different codified methods (JG/T 199-2007; ISO 22157-2004) with the aim of reviewing the differences in the results of small coupons and full culm specimens, as well as emphasising the issues related to the measurement of strains in a material with through-thickness gradient fibre distribution under axial compression. In order to model the variability across the culm wall, the volume fraction of the fibres was calculated by image analysis. In addition, assessment of through-thickness strain distributions of small coupons using digital image correlation (DIC) was carried out and is discussed in this paper. The validation process for the composite material model is ongoing.
| Type: | Proceedings paper |
|---|---|
| Title: | Calibrating a composite material model for analysis and design of bamboo structures |
| Event: | 10th World Bamboo Congress, 17-22 September 2015, Damyang, South Korea |
| Location: | Damyang, South Korea |
| Dates: | 17 February 2016 - 22 February 2016 |
| ISBN-13: | 9781510813267 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://www.worldbamboo.net/news-and-events/world-b... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1534516 |
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