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.