LUO Yitian,LI Guoxin,HAO Xiaolong,et al.Effects of Stitching Technique and Lay-Up Configuration on Mechanical Properties of Bamboo Strip Composites[J].Chinese Journal of Wood Science and Technology,2025,39(04):68-77. DOI: 10.12326/j.2096-9694.2025027.
Bamboo strip composites were fabricated using vacuum infusion process (VIP)
with two-dimensional woven fabrics prepared by stitching technique as reinforcements. The effects of stitch spacing and layup configuration (symmetrical and staggered forming) on mechanical properties were investigated. Results showed that at 8 cm stitch spacing
unidirectional composites in the 0° direction exhibited increased tensile
flexural
and impact strengths by 7.6%
5.6%
and 15.3%
respectively
compared to non-stitched samples. Furthermore
the staggered distribution of stitching threads across layers effectively mitigated stress concentration. However
excessively small stitch spacing causes damages in bamboo strips and resin-rich zones
reducing mechanical properties in the 0° direction. Furthermore
layup configuration significantly influences mechanical performance. Tensile properties improve with increasing concentration of unidirectional fiber layers
and the [90/0/0
]
s
configuration exhibits optimal performance in 0° direction
with tensile strength and modulus reaching 183 MPa and 20.4 GPa
respectively. Flexural properties are governed by surface layer orientation
with the [0/0/90
]
s
configuration showing maximum flexural strength (320.4 MPa) and modulus (17.1 GPa) in 0° direction
along with superior deformation resistance. The [90/0/0
]
s
configuration demonstrates optimal impact strength (91.4 kJ/m²) in 0° direction
attributed to th
e continuous distribution of 0° bamboo strip that effectively mitigates stress concentration. Various layup configuration effectively affect the mechanical properties of bamboo strip composites. This study provides design basis for the engineering application of bamboo-strip composites through the optimization of both process and structure.
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references
LI H Y , ZHANG N , WANG L , et al . The challenge of recycling fast-growing fibre-reinforced polymer waste [J ] . Nature Reviews Materials , 2025 , 10 ( 2 ): 81 - 82 .
YU K , SHI Q , DUNN M L , et al . Carbon fiber reinforced thermoset composite with near 100% recyclability [J ] . Advanced Functional Materials , 2016 , 26 ( 33 ): 6098 - 6106 .
MU W L , CHEN L Y , LI S J , et al . Effect of layering sequence on low velocity impact properties of flax/basalt fiber hybrid composites [J ] . Composites Science and Engineering , 1 - 7 [ 2025-08-04 ] . https://link.cnki.net/urlid/10.1683.TU.20241223.1344.002 https://link.cnki.net/urlid/10.1683.TU.20241223.1344.002 .
HAN S Y , CHEN F M , YU Y , et al . Bamboo-inspired renewable, lightweight, and vibration-damping laminated structural materials for the floor of a railroad car [J ] . ACS Applied Materials & Interfaces , 2022 , 14 ( 37 ): 42645 - 42655 .
LAU K T , HUNG P Y , ZHU M H , et al . Properties of natural fibre composites for structural engineering applications [J ] . Composites Part B: Engineering , 2018 , 136 : 222 - 233 .
ZAKIKHANI P , ZAHARI R , SULTAN M T H , et al . Extraction and preparation of bamboo fibre-reinforced composites [J ] . Materials & Design , 2014 , 63 : 820 - 828 .
CHEN H , WU J Y , SHI J J , et al . Strong and highly flexible slivers prepared from natural bamboo culm using NaOH pretreatment [J ] . Industrial Crops and Products , 2021 , 170 : 113773 .
甄晟瑶 . 竹篾基本性能评价及染色性能研究 [D ] . 南京 : 南京林业大学 , 2024 .
HAO X L , ZHOU H Y , MU B S , et al . Effects of fiber geometry and orientation distribution on the anisotropy of mechanical properties, creep behavior, and thermal expansion of natural fiber/HDPE composites [J ] . Composites Part B: Engineering , 2020 , 185 : 107778 .
HUANG H H , KONG L C , LIU W H , et al . Recycled carbon fiber layering orientation optimization and its performance of composites [J ] . Acta Materiae Compositae Sinica , 2024 , 41 ( 7 ): 3525 - 3535 .
MARTIN B , COMAS-CARDONA S , BINETRUY C , et al . Influence of fabrics’ design parameters on the morphology and 3D permeability tensor of quasi-unidirectional non-crimp fabrics [J ] . Composites Part A: Applied Science and Manufacturing , 2016 , 90 : 470 - 479 .
LIU C , FAN H , HUA J , et al . Influence of ply orientated angles on the jute fiber reinforced composites [J ] . Journal of Northeast Forestry University , 2016 , 44 ( 2 ): 52 - 55, 79 .
WANG C H , CHEN Z , ZHANG Q J . Application of stitching technology in fabricating long bamboo fiber-reinforced composites [J ] . China Plastics Industry , 2016 , 44 ( 7 ): 47 - 50 .
ZHAO J L , ZHANG S , KE X L , et al . Simultaneously tuning interfacial and interlaminar properties of glass fiber fabric/epoxy laminated composites via modifying fibers with graphene oxide [J ] . Composites Science and Technology , 2023 , 235 : 109970 .
WANG Z G , SMITH D E . Numerical analysis on viscoelastic creep responses of aligned short fiber reinforced composites [J ] . Composite Structures , 2019 , 229 : 111394 .