Basic Mechanical Properties of Laminated Flattened-Bamboo Composite: An Experimental and Parametric Investigation
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 8
Abstract
To reduce carbon emissions in the construction industry, more and more researchers have paid attention to engineered bamboo, a natural and green material. This research focused on laminated flattened-bamboo (LFB), a new bamboo composite produced by the advanced non-notched flattened-bamboo technology which can improve the utilization rate of bamboo and reduce production costs by reducing the use of adhesive compared with the gluing process of conventional bamboo laminates. The basic mechanical properties under compression, tension, three-point bending, and shearing of LFB in three orthogonal directions were mainly studied. Experimental results showed that compressive and tensile strength (modulus) along the grain direction were 56.2 MPa (9,542.7 MPa) and 106.9 MPa (10,151.1 MPa), respectively; in the radial direction were 43.1 MPa (580.9 MPa) and 1.8 MPa (1,459.6 MPa), respectively; in the tangential direction were 19.0 MPa (1,124.5 MPa) and 4.3 MPa (5,112.5 MPa), respectively; the mean bending strength (modulus) was 80.8 MPa (8,076.8 MPa), and the shear strength (modulus) was 17.3 MPa (1,878.8 MPa). The measured properties were comparable to that of other structural bio-based materials, showing LFB has the potential to be an alternative to timber in future construction applications. The modulus and Poisson’s ratio was analyzed, and the result showed that LFB could be regarded as orthotropic material approximately. The failure types under various loading conditions were summarized. Based on the Ramberg Osgood relation, the stress-strain models of LFB composite under compression, tension, and shearing were proposed, and the characteristic value of ultimate strength and elastic modulus was determined by parametric analysis.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (Nos. 51878354 and 51308301); the Natural Science Foundation of Jiangsu Province (Nos. BK20181402 and BK20130978); 333 talent high-level projects of Jiang-su Province; Qinglan Project of Jiangsu Higher Education Institutions; Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. KYCX21_0902); and China Scholarship Council (No. 202108320925). Any research results expressed in this paper are those of the writer(s) and do not necessarily reflect the views of the foundations. The writers gratefully acknowledge Han Zhang, Wei Xu, Bingyu Jian, TingTing Ling, Gensheng Cheng, Xiaoyan Zheng, Shaoyun Zhu, Liqing Liu, Dunben Sun, Jing Cao, Yanjun Liu, Junhong Xu, Leonel Mimendi, and others from the Nanjing Forestry University for helping.
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Journal of Materials in Civil Engineering
Volume 35 • Issue 8 • August 2023
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Received: Sep 2, 2022
Accepted: Jan 20, 2023
Published online: May 31, 2023
Published in print: Aug 1, 2023
Discussion open until: Oct 31, 2023
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