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| Shearing mechanical properties of Cyperus esculentus |
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| KeyWord:Cyperus esculentus peeling shearing test breaking force hardness breaking energy |
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| Abstract: |
| In order to select suitable crushing equipment, the changes of shearing mechanical properties of Cyperus esculentus before and after peeling were investigated. Based on the preliminary investigation of the effect of peeling on the shearing properties of Cyperus esculentus, the effects of moisture content, loading rate, loading orientation and particle size on the breaking force, hardness and breaking energy of unpeeled and peeled Cyperus esculentus were investigated by using the physical property analyzer. The results showed that there was an effect of peeling on the shearing properties of Cyperus esculentus.The moisture content, loading rate, loading orientation and particle size all had significant effects on the breaking force, hardness and breaking energy of unpeeled and peeled Cyperus esculentus. The breaking force, hardness and breaking energy of unpeeled and peeled Cyperus esculentus decreased with the increasing of moisture content and the decreasing of particle size, while tended to increase and then decrease with the increasing of loading rate, and a larger value obtained at a loading rate of 0.3 mm/s. The shear resistance was the greatest in the X-axis, followed by the Z-axis and the least in the Y-axis for peeled Cyperus esculentus, and it was the greatest in the Z-axis, followed by the X-axis and the least in the Y-axis for unpeeled Cyperus esculentus. In addition, under the same shearing conditions, the breaking force, hardness and breaking energy of peeled Cyperus esculentus were much lower than those of unpeeled Cyperus esculentus. The results of the study can provide the necessary theoretical basis for the improvement of processing machinery and the setting of process conditions for Cyperus esculentus. |
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