Xinjiang Agricultural Sciences ›› 2024, Vol. 61 ›› Issue (11): 2797-2806.DOI: 10.6048/j.issn.1001-4330.2024.11.021

• Prataculture • Previous Articles     Next Articles

Effects of different moisture contents on the mechanical properties and peeling effect of Apocynum venetum

LIU Chenyang, ZHANG Liping(), ZHENG Weiqiang, LUO Haowei   

  1. College of Mechanical Engineering, Xinjiang University,Urumqi 830017, China
  • Received:2024-04-28 Online:2024-11-20 Published:2025-01-08
  • Correspondence author: ZHANG Liping
  • Supported by:
    Natural Science Foundation of Xinjiang Uygur Autonomous Region(2022D01C394)

不同含水率对罗布麻力学特性及剥麻效果的影响

刘晨阳, 张立萍(), 郑威强, 罗豪威   

  1. 新疆大学机械工程学院,乌鲁木齐 830017
  • 通讯作者: 张立萍
  • 作者简介:刘晨阳( 1998-),男,河南周口人,硕士研究生,研究方向为智慧农业装备,(E-mail)1747244232@qq.com
  • 基金资助:
    新疆维吾尔自治区自然科学基金项目(2022D01C394)

Abstract:

【Objective】 To study the effects of different moisture contents on the mechanical properties and stripping effect of Apocynum venetum, and ultimately obtain the basic mechanical parameters of Apocynum venetum stem and the changes in mechanical parameters under different moisture contents in the hope of providing effective parameter support for subsequent research, and selecting a suitable moisture content for stripping and impurity removal, which might improve the quality of hemp bark during mechanical stripping and reduce the difficulty of impurity removal.【Methods】 The mechanical properties of Apocynum venetum stem, xylem, and phloem were studied using Apocynum venetum stem produced in Yuli County, Xinjiang as the experimental object.Tensile, compressive, and bending tests were performed on the stems of Apocynum venetum with moisture content of 19.31%, 38.52%, and 54.68%, and then the measured mechanical parameters were compared.Finally, separate hemp stripping tests were conducted to observe the hemp stripping effect.【Results】 Generally, the moisture content of the processed Apocynum venetum was 6.86%, and the maximum tensile load of the phloem of the Apocynum venetum stem was 72.00 N; The tensile elastic modulus of Apocynum venetum stem and xylem were 389.38 and 348.07 MPa, respectively, with compressive strength of 1.10 and 1.27 MPa, and bending strength of 65.75 and 60.12 N.The mechanical properties of Apocynum venetum with different moisture contents exhibited certain regularity.【Conclusion】 The mechanical parameters of Apocynum venetum with different moisture contents are obtained.By comparing the hemp stripping test and considering the hemp stripping effect and impurity removal, the effect of Apocynum venetum stem with moisture content around 38.52% is better.

Key words: Apocynum venetum; moisture content; mechanical properties; remove impurities; stripping hemp

摘要:

【目的】研究不同含水率对罗布麻力学特性以及剥麻效果的影响,分析罗布麻茎秆基本力学参数及不同含水率时力学参数的变化,并选取适合剥麻和除杂的含水率,为提高机械剥麻过程中的麻皮质量、降低除杂难度提供有效参数支持。【方法】以新疆尉犁县所产的罗布麻茎秆作为试验对象,设计罗布麻的茎秆、木质部和韧皮部进行力学特性试验,分别对比含水率为19.31%、38.52%和54.68%的罗布麻茎秆进行拉伸、压缩和弯曲试验,测得力学参数,分别进行剥麻试验,分析剥麻效果。【结果】一般待加工罗布麻含水率为6.86%,其罗布麻茎秆韧皮部的最大抗拉载荷为72.00 N;罗布麻茎秆和木质部的拉伸弹性模量分别为389.38、348.07 MPa,抗压强度分别为1.10、1.27 MPa,抗弯强度为65.75、60.12N。不同含水率的罗布麻力学特性呈一定的规律性。【结论】获得了不同含水率的罗布麻力学参数,对比剥麻试验,综合剥麻效果和除杂效果,含水率在38.52%左右的罗布麻茎秆剥麻效果较好。

关键词: 罗布麻, 含水率, 力学特性, 除杂, 剥麻

CLC Number: