芒草茎秆弯曲特性试验

以湘杂芒2号、芒/南荻杂交种、2年生南荻无性繁殖苗和3年生南荻种子苗为试验对象,测量、计算芒草不同节间含水率、外径、原始截面面积、茎秆截面惯性矩、最大荷载、弹性模量、抗弯刚度等,研究芒草茎秆的弯曲特性.结果表明,湘杂芒2号、芒/南荻杂交种、2年生南荻无性繁殖苗和3年生南荻种子苗的茎秆最大弹性模量分别为6 377.07、...

Study on bending properties of Miscanthus

Bending properties of miscanthus was investigated by Measuring and analyzing internode moisture content, outside diameter, original cross-sectional area, cross sectional moment of inertia, peak load, elastic modulus and bending rigidity. The results showed big differences in the bending properties among different varieties of miscanthus, and for hybrid miscanthus variety Xiangzamang No.2, hybrid variety between Miscanthus and Triarrhena lutarioriparia, biennial Triarrhena lutarioriparia apogamic seedling and triennial Triarrhena lutarioriparia, the averages of tensile strength were 6 377.07, 5 162.36, 1 694.72 and 1 364.92 MPa, respectively, whose maximum stress were 88.37, 103.48, 39.07 and 38.25 MPa respectively. As the design of cutting, crushing and holding mechanism must be based on the maximum value, the greatest stress presented on the 8th stem of the hybrid variety between Miscanthus and Triarrhena lutarioriparia, which was 103.48 MPa could be considered for crushing machine design.