数字农科院2.0

Investigation of mechanical properties of cotton stalk based on multi-component analyses

文献类型： 外文期刊

作者： Zhao, Weisong;Xie, Jianhua;Wang, Zhenwei;Gao, Qiming;Chen, Mingjiang

作者机构：

关键词： provided design puller;K e y w o r d s;cotton stalk;elastic modulus;composite mate-rial;uprooting

期刊名称： INTERNATIONAL AGROPHYSICS

ISSN： 0236-8722

年卷期： 2022 年 36.0 卷 4 期

页码：

收录情况： SCIE（2022版）

摘要： A b s tr a c t. A comprehensive understanding of the uprooting failure mechanism will likely require the accurate characteriza-tion of the mechanical properties of cotton stalk. Uprooting failure includes a fractured cotton stalk and peeled phloem sliding along the xylem. The modulus of elasticity of cotton stalk and its tis-sues (xylem and phloem) were measured using three different modes (tensile, compression and bending), and the reasons for the fractured cotton stalk and the peeled phloem sliding along the xylem were analysed from the perspective of composite mechan-ics. The results showed that the cotton stalk radially conforms to the properties of the composite with transverse anisotropy. The axial modulus of elasticity was significantly larger than the radial modulus of elasticity (axial modulus of elasticity: cotton stalk is 3181.79 MPa, xylem is 1093.91 MPa, phloem is 249.89 MPa, radial modulus of elasticity: is 91.04 MPa, xylem is 83.77 MPa, phloem is 77.01 MPa). Xylem is the backbone of the stalk that provides 96% of its compressive strength. The direct cause of fractured cotton stalk originated from the load force that exceeded its intrinsic compressive strength. Peeled phloem sliding along the xylem was related for the most part to the different radial modu-lus of elasticity of the xylem and phloem, and the weak cohesion between these two tissues. Based on the results, some suggestions were for the of a

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