Effect of off-axis angle on tension failures of laminated moso bamboo-poplar veneer composites: An in situ characterization

Shanyu Han; Fuming Chen; Haidong Li; Ge Wang

Materials & Design (Dec 2021)

Effect of off-axis angle on tension failures of laminated moso bamboo-poplar veneer composites: An in situ characterization

Shanyu Han,
Fuming Chen,
Haidong Li,
Ge Wang

Affiliations

Shanyu Han: Department of Biomaterials, International Centre for Bamboo and Rattan, Beijing 100102, China; SFA and Beijing Co-built Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing 100102, China
Fuming Chen: Department of Biomaterials, International Centre for Bamboo and Rattan, Beijing 100102, China; SFA and Beijing Co-built Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing 100102, China; Corresponding authors at: Department of Biomaterials, International Centre for Bamboo and Rattan, No. 8, Futong East Street, Chaoyang District, Beijing 100102, China.
Haidong Li: Henan Polytechnic University, Jiaozuo, Henan Province, 454003, China
Ge Wang: Department of Biomaterials, International Centre for Bamboo and Rattan, Beijing 100102, China; SFA and Beijing Co-built Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing 100102, China; Corresponding authors at: Department of Biomaterials, International Centre for Bamboo and Rattan, No. 8, Futong East Street, Chaoyang District, Beijing 100102, China.

Journal volume & issue: Vol. 212
p. 110254

Abstract

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Inspired by the natural gradient structure of the moso bamboo wall, a hybrid moso bamboo（B)Wood(W) veneer Composite (BWC) was developed with a specific structure of [B0°/ W90°/ B0°]. The dynamic fracture behaviors and damage mechanism of the BWC were characterized using in situ scanning electron microscopy. X-ray micro- computed tomography imaging was employed to verify the off-axis tensile mechanical properties. The results showed that the maximum tensile strength and modulus of the BWC under off-axis loadings were 232.25 MPa and 17.47 GPa, respectively. Meanwhile, the maximum specific strength and specific modulus of the BWC were 290.31 MPa·cm3·g−1 and 23.84 GPa·cm3·g−1, respectively, which are higher than both natural wood (95.26 MPa·cm3·g−1, 10.82 GPa·cm3·g−1), bamboo (208.56 MPa·cm3·g−1, 15.74 GPa·cm3·g−1) and even steel alloy (237.86 MPa·cm3·g−1, 21.98 GPa·cm3·g−1). Compared to reorganized bamboo (RB), the porosity of the BWC was 61.1% lower. The BWC was strengthened via internal toughening mechanisms (i.e. fiber bridging) and external toughening mechanisms (i.e. multiregional distribution of micro-cracks). This work highlights methods to design high-performance bio composite from commonly used biomaterials through synergistic strengthening and toughening mechanisms, which has significant advantages in the ever-growing construction industry.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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