玉米秸秆皮拉伸和剪切特性试验

为设计玉米秸秆皮穰叶分离机械并优化其参数,本该文对玉米秸秆皮的拉伸和剪切特性进行了二次回归正交旋转试验研究。该文通过试验研究了含水率和取样高度对玉米秸秆皮拉伸强度的影响;含水率、取样高度和剪切速度对玉米秸秆皮的剪切强度的影响。试验结果分析表明:对于抗拉强度,在含水率为30%时玉米秸秆下部秸秆皮的抗拉强度达到最大值,其值为67.2MPa。在研究抗拉强度的2个因素中,取样高度对玉米秸秆皮的拉伸强度影响较显著。对于剪切强度,在研究的3个因素中,剪切速度和含水率对玉米秸秆皮的剪切强度影响较显著,而取样高度对玉米秸秆皮的剪切强度影响不显著。

Experiment on tensile and shearing characteristics ofrind of corn stalk

To design and optimize the parameters of separation equipment for rind, pith and leaf of corn stalk, tensile and shearing characteristics of rind of corn stalk were studied via quadratic orthogonal rotatory combination design in this paper. General effects of moisture content, sampling height and shearing speed on the tensile/shear strength of rind of corn stalk were studied by experiments. The results of data analysis reveal that when the moisture content is about 30%, the tensile strength of rind of corn stalk at the bottom part close to the soil reaches the maximum value of 67.2 MPa. Within the two model factors, the impact of sampling height on the tensile strength is significant. Among the three factors, the shearing speed and moisture content are significant factors on the shear strength of rind of corn stalk, while the sampling height is not significant.