芋头压缩和切削力学特性研究

为了解芋头压缩和切削力学特性，以山东小芋头为试验样本，利用TMS-PRO食品物性分析仪对芋头样本进行压缩试验，计算得出芋头失效应变和弹性模量等参数。利用定制刀具，对芋头在不同切削厚度、不同刀具刃角、不同刀具滑切角情况下进行切削试验，测得切削过程中最大切削力，运用SPSS软件分析变化规律。试验得出:所选芋头样本失效应变为0.314，抗压强度为1.490 MPa，弹性模量为4.751 MPa；随着切削厚度增加最大切削力增大，且切削厚度＞3 mm后增长缓慢；随着刀具刃角的增加最大切削力增加；随着刀具滑切角的增加最大切削力显著减小。对交互试验结果的方差分析，得出切削厚度、刀具刃角和滑切角均对芋头的最大切削力有极显著影响，切削厚度和刀具刃角的交互作用具有显著影响，切削厚度和刀具滑切角的交互作用具有极显著影响。试验分析结果可为芋头收获和加工等机械的设计、制造提供理论依据。 

Study on Mechanical Properties of compression and cutting of taro

To understand taro cutting and compression mechanical properties of test samples for shandong eddoes, using TMS - PRO food property analyzer for taro compression test samples, calculated parameters such as taro failure strain and modulus of elasticity, with a custom tool, the taro in different cutting thickness, cutting tool edge Angle, cutting test under different cutting tool sliding cutting Angle,The maximum cutting force in the cutting process was measured, and the change rule was analyzed by SPSS software.The failure strain, compressive strength and elastic modulus of taro samples were 0.314, 1.490Mpa and 4.751Mpa respectively.The maximum cutting force increases with the increase of cutting thickness, and increases slowly when the cutting thickness is greater than 3mm.The maximum cutting force increases with the increase of tool edge Angle.Through variance analysis of interaction test results, it is concluded that cutting thickness, cutting edge Angle and sliding cutting Angle all have significant effects on the maximum cutting force of taro, and the interaction between cutting thickness and tool edge Angle and the interaction between cutting thickness and tool sliding cutting Angle also have significant effects.The maximum cutting force decreases significantly with the increase of tool slip Angle.The experimental results can provide theoretical basis for the design and manufacture of taro harvesting and processing machinery.