玉米秸秆自干后的材料力学性质研究

Study on Mechanical Properties of Air Drying Corn Stalk

玉米秸秆直接还田或沤肥是大量增加土壤有机质的优质有机肥,也是生物质能源转化及混合饲料利用的重要资源。目前,在这几方面的应用中均需进行粉碎、揉丝、切段等加工,针对加工参数的优化需要研究其力学性质。为此,试验研究了越冬后自然干燥的玉米秸秆的弯曲强度、皮质层和内芯的剪切强度、拉伸强度、弹性模量及穿刺强度等力学性质指标,以及应力应变规律、抗弯折特性、茎秆不同节间的力学性质变化等材料力学特性,为相关加工设备及工艺参数优化提供了理性参考依据。

The corn stalk direct- application or waterlogged compost was the high quality organic fertilizer,largely increase soil organic matter,and it also was an important resource of biomass energy conversion and mixed feed utilization.Processing such as smashing,rubbing and cutting should be performed in these applications,so we studied its mechanical properties for optimization of process parameters. We tested the bending strength of air drying corn stalk after winter,and the shear strength,tensile strength,elasticity modulus,puncture strength of the cortical layer and inner core,and studied regularity of the stress and strain,bending resistance and the mechanical properties regulation of different internodes. The study provides rational reference basis for related processing equipment and optimization of process parameter.