Journal of Bionic Engineering ›› 2025, Vol. 22 ›› Issue (5): 2486-2502.doi: 10.1007/s42235-025-00735-3
In-Situ Revelation of Water Effects on the Deformation and Fracture Behavior of Moso Bamboo
Jiucheng Zhao1,2,3,4; Shanyue Guan1,2; Yiqiang Li1,2,3; Shunbo Wang1,2; Xiangyu Zong1,2,3; Shizhong Zhang1,2; Hongwei Zhao1,2,3
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1 Key Laboratory of CNC Equipment Reliability, Ministry ofEducation, Jilin University, Changchun 130025, China
2 Key Laboratory of Bionic Engineering Ministry of Educationof China, Changchun 130025, China
3 Institute of Structured and Architected Materials, LiaoningAcademy of Materials, Shenyang 110167, China 4 State Key Laboratory for Strength and Vibration ofMechanical Structures, Xi’an Jiaotong University,Xi’an 710049, China
In-Situ Revelation of Water Effects on the Deformation and Fracture Behavior of Moso Bamboo
Jiucheng Zhao1,2,3,4; Shanyue Guan1,2; Yiqiang Li1,2,3; Shunbo Wang1,2; Xiangyu Zong1,2,3; Shizhong Zhang1,2; Hongwei Zhao1,2,3 #br#
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1 Key Laboratory of CNC Equipment Reliability, Ministry ofEducation, Jilin University, Changchun 130025, China
2 Key Laboratory of Bionic Engineering Ministry of Educationof China, Changchun 130025, China
3 Institute of Structured and Architected Materials, LiaoningAcademy of Materials, Shenyang 110167, China 4 State Key Laboratory for Strength and Vibration ofMechanical Structures, Xi’an Jiaotong University,Xi’an 710049, China
摘要： Bamboo is an important building material with natural hygroscopicity, and the mechanism of water effects on its deformation and fracture behavior has not been fully revealed. For this purpose, a novel in-situ testing method was developed in this study, which coupled Acoustic Emission (AE) and Digital Image Correlation (DIC) techniques. This method was used to investigate the effects of various Moisture Content (MC) levels (0, 6%, 15%, and 25%) on the tensile behavior of bamboo. The results showed that as the MC increased from 0 to 25%, the tensile strength of bamboo decreased from 163 to 110 MPa, the Young's modulus dropped from 8.5 to 3.9 GPa, and the elongation increased from 4.3 to 14%. An increase in MC could effectively promote the occurrence of subcritical cracks and micro-interfacial dissociations in bamboo. The synergistic effect of these two factors facilitated strain dispersion, ensuring adaptability to large deformations. Additionally, it was found that an increase in MC could significantly alter the fracture mode. This ingenious synergistic effect in bamboo was revealed for the first time in this study. The mechanisms discovered in this study may provide some important insights into the design and fabrication of advanced biomimetic heterostructures and biomimetic interfacial materials.