大豆秸秆剪切力学特性的研究

在微机控制电子万能试验机上对大豆秸秆的剪切力学特性进行研究。以大豆秸秆含水率、剪切角度和刀刃角作为影响因素,采用隶属度的综合评分法对抗剪强度和比能综合评分,建立二次多项式回归模型,并用响应面法对剪切工艺参数进行优化。结果表明:剪切角度对大豆秸秆剪切效果的影响程度最大,刀刃角的影响最小,大豆秸秆剪切的最佳条件为秸秆含水率25%、剪切角度60°、刀刃角45°,在该条件下对大豆秸秆进行剪切,得到最大综合分为0.969。

Study on shearing properties of soybean straw

The shearing properties of soybean straw were studied by using microcomputer controlled electron universal testing machine. The effect of the straw moisture content, the shear angle and the cutting edge angle on the shear strength and specific energy were scored by using the comprehensive evaluation of the membership-degree method. The quadratic polynomial regression model was established to optimize the shearing parameters by response surface methodology. The results showed that shear angle had most significant effect on the shearing properties, while the cutting edge angle had the least effect. The optimal conditions to shear the soybean straw were the straw moisture content of 25%, the shear angle of 60°, and the cutting edge angle of 45°, under which the comprehensive score was 0.969.