Abstract
The effects of veneer orientation and loading direction on the mechanical properties of bamboo-bundle/poplar veneer laminated veneer lumber (BWLVL) were investigated by a statistical analysis method. Eight types of laminated structure were designed for the BWLVL aiming to explore the feasibility of manufacturing high-performance bamboo-based composites. A specific type of bamboo species named Cizhu bamboo (Neosinocalamus affinis) with a thickness of 6 mm and diameter of 65 mm was used. The wood veneers were from fast-growing poplar tree (Populus ussuriensis Kom.) in China. The bamboo bundles were obtained by a mechanical process. They were then formed into uniform veneers using a one-piece veneer technology. Bamboo bundle and poplar veneer were immersed in water-soluble phenol formaldehyde (PF) resin with low molecular weight for 7 min and dried to MC of 8–12 % under the ambient environment. All specimens were prepared through hand lay-up using compressing molding method. The density and mechanical properties including modulus of elasticity (MOE), modulus of rupture (MOR), and shearing strength (SS) of samples were characterized under loading parallel and perpendicular to the glue line. The results indicated that as the contribution of bamboo bundle increased in laminated structure, especially laminated on the surface layers, the MOE, MOR and SS increased. A lay-up BBPBPBB (B-bamboo, P-poplar) had the highest properties due to the cooperation of bamboo bundle and poplar veneer. A higher value of MOE and MOR was found for the perpendicular loading test than that for the parallel test, while a slightly higher SS was observed parallel to the glue line compared with perpendicular loading. Any lay-up within the homogeneous group can be used to replace others for obtaining the same mechanical properties in applications. These findings suggested that the laminated structure with high stiffness laid-up on the surface layers could improve the performance of natural fiber reinforced composites.
Similar content being viewed by others
References
Abdul KHPS, Bhat IUH, Jawaid M, Zaidon A, Hermawan D, Hadi YS (2012) Bamboo fiber reinforced biocomposites: a review. Mater Des 42:353–368
Chattopadhyay SK, Khandal RK, Uppaluri R, Ghoshal A (2011) Bamboo fiber reinforced polypropylene composites and their mechanical, thermal, and morphological properties. J Appl Pol Sci 119(3):1619–1626
Chen FM, Deng JC, Jiang ZH, Wang G, Zhang D, Zhao QC, Cai LP, Shi QS (2014a) Evaluation of the uniformity of density and mechanical properties of bamboo-Bundle laminated veneer lumber (BWLVL). BioResources 9(1):554–565
Chen FM, Deng JC, Cheng HT, Li HD, Jiang ZH, Wang G, Zhao QC, Shi SQ (2014b) Impact properties of bamboo bundle laminated veneer lumber by preprocessing densification technology. J Wood Sci 60(6):421–427
Cheng Z, Dai CP, Smith GD (2011) Modeling vertical density profile formation for strand-based wood composites during hot pressing: part 2. Experimental investigations and model validation. Compos Part B 42(6):1350–1356
Deng JC, Li HD, Wang G, Chen FM, Zhang WF (2015) Effect of removing extent of bamboo green on physical and mechanical properties of Laminated Bamboo-bundle Veneer Lumber. Eur J Wood Prod 73(4):499–506
Du CP, Zhang QS, Chen SG, Liu ZK (2009) Distribution characteristics of horizontal density of Chinese fir oriented laminated stick lumber (OLSL). J Zhejinag For Univ 26(4):445–460
Grosser D, Liese W (1971) On the anatomy of Asian bamboos, with special reference to their vascular bundles. Wood Sci Technol 5(4):290–312
Hebel DE, Javadian A, Heisel F, Schlesier K, Griebel D, Wielopolski M (2014) Process-controlled optimization of the tensile strength of bamboo fiber composites for structural applications. Compos B 67:125–131
John MJ, Thomas S (2008) Biofibres and biocomposites. Carbohydr Polym 71(3):343–364
Koronis G, Silva A, Fontul M (2013) Green composites: a review of adequate materials for automotive applications. Compos B 44(1):120–127
Lee CH, Chung MJ, Lin CH, Yang TH (2012) Effects of layered structure on the physical and mechanical properties of laminated moso bamboo (Phyllosachys edulis) flooring. Constr Build Mater 28(1):31–35
Liu DG, Song JW, Anderson DP, Chang PR, Hua Y (2012) Bamboo fiber and its reinforced composites: structure and properties. Cellulose 19(5):1449–1480
Mahdavi M, Clouston PL, Arwade SR (2012) A low-technology approach toward fabrication of laminated bamboo lumber. Constr Build Mater 29(4):257–262
Peng Z, Lu Y, Li L, Zhao Q, Feng Q, Gao Z, Jiang Z (2013) The draft genome of the fast-growing non-timber forest species moso bamboo (Phyllostachys heterocycla). Nat Genet 45(4):456–461
Shao SL, Wen G, Jin ZF (2008) Changes in chemical characteristics of bamboo (Phyllostachyspubescens)components during steam explosion. Wood Sci Technol 42(6):439–451
Wang G, Yu Y, Shi SQ, Wang JW, Cao SP, Cheng HT (2011) Microtension test method for measuring tensile properties of individual cellulosic fibers. Wood Fiber Sci 43(3):251–256
Wang G, Jiang ZH, Chen FM, Cheng HT, Sun FB (2013) Manufacture situation and problem analysis for large span bamboo engineering material in China. China Forest Prod Ind 40(6):49–53
Xiao Y, Yang RZ, Shan B (2013) Production, environmental impact and mechanical properties of glubam. Constr Build Mater 44(3):765–773
Yu YL, Huang X, Yu WJ (2014a) High performance of bamboo-based fiber composites from long bamboo fiber bundles and phenolic resins. J Appl Polym Sci 131(12):1–8
Yu Y, Wang HK, Lu F (2014b) Bamboo fibers for composite applications: a mechanical and morphological investigation. J Mater Sci 49(6):2559–2566
Yu YL, Huang X, Yu WJ (2014c) A novel process to improve yield and mechanical performance of bamboo fiber reinforced composite via mechanical treatments. Compos B 56(1):48–53
Zakikhani P, Zahari R, Sultan MTH, Majid DL (2014) Extraction and preparation of bamboo fibre-reinforced composites. Mater Des 63(2):820–828
Acknowledgments
The authors are grateful for the financial support of the Fundamental Research Funds for the International Centre for Bamboo and Rattan (1632015003). The constructive comments from the anonymous reviewers are also greatly appreciated.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chen, F., Deng, J., Li, X. et al. Effect of laminated structure design on the mechanical properties of bamboo-wood hybrid laminated veneer lumber. Eur. J. Wood Prod. 75, 439–448 (2017). https://doi.org/10.1007/s00107-016-1080-8
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00107-016-1080-8