Failure mechanisms of structural bamboo using microstructural analyses

Chahrour, Mutaz K. and Hosen, Md. Akter and Goh, Yingxin and Tong, Teong Yen and Yap, Soon Poh and Khadimallah, Mohamed Amine (2021) Failure mechanisms of structural bamboo using microstructural analyses. Advances in Materials Science and Engineering, 2021. ISSN 1687-8434, DOI

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Bamboo is deemed an emerging constructional material with promising application projections due to the reliable natural properties and advantageous structural characteristics. However, there is a lack of systematic studies on the mechanical characteristics of the bamboo species from a microstructural scale. Hence, this paper investigated the primary mechanical properties of the bamboo specimens (Dendrocalamus asper) with further microstructural analysis on the bamboo failure. The direct tensile strength of bamboo specimens was about 226.45 MPa, while the final splitting tensile modulus was found to be 2.88 MPa. Microstructural characterisation of the failed tensile specimens indicates that fibre debonding is the main failure mechanism under tensile conditions. On the other hand, splitting and end bearing failure were found on compression test specimens. In addition, nanoindentation tests were carried out on different cell structures to articulate the hardness and Young's modulus. The elastic modulus of the fibre cell walls is three times that of the parenchyma cell walls, yet the hardness values are comparable. This confirms that the specimen failure of previous macromechanical testing is due to crack propagation along the parenchyma cells, instead of the cell walls. Based on the experimental studies discussed in this paper, the conclusion can convey a positive message regarding the ability of bamboo as a primary sustainable substitute for conventional construction materials.

Item Type: Article
Funders: Deanship of Scientific Research at Prince Sattam Bin Abdulaziz University (16794/01/2020), Universiti Malaya Faculty Research Grant (GPF), (Development of Green and Space-Efficient Low-Cost Structures from Renewable Materials) (GPF008A-2019)
Uncontrolled Keywords: Fiber; Modulus;
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering > Department of Mechanical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 12 Apr 2022 07:47
Last Modified: 12 Apr 2022 07:47

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