材料科学
复合材料
竹子
弹性模量
弯曲
杨氏模量
模数
拉伸试验
骨料模量
切线模量
极限抗拉强度
动态模量
动态力学分析
聚合物
作者
Xianzhi Gao,Guangyan Liu,Lu Wang,Yanan Yi,Guang Yong Lin,Shuping Ma
出处
期刊:Holzforschung
[De Gruyter]
日期:2020-12-04
卷期号:75 (7): 626-634
被引量:2
摘要
Abstract As a natural graded material, bamboo has gradually increasing elastic modulus along the radial direction from the inner to the outer skin. Accurate measurement of the modulus distribution plays an important role in bamboo-based structural design. However, it is difficult to characterise this modulus distribution by using conventional testing approaches on bamboo slices. A more effective method was developed in this study for the inverse identification of gradually varying material properties. The method is based on the digital image correlation and finite element model updating techniques. The radial distribution of the elastic modulus of bamboo was obtained through only one four-point bending test. The inversely identified modulus distribution was verified through uniaxial tensile tests on sliced bamboo strips and microscopic observation of the volume fraction distribution of its vascular bundle. The results showed that the elastic modulus of the bamboo material decreased from the outer skin (20 GPa) to the inner skin (2 GPa), which is in good consistence with the tensile test results on sliced specimens.
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