成熟期大蒜茎秆物理力学特性试验研究OA

In view of the lack of necessary data support in the design of garlic harvester,the physical and mechanical properties of garlic in mature stage were studied experimentally.The geometric characteristics of garlic stalks were analyzed by mathematical statistics in agricultural field,and the moisture content of mature garlic was determined.The shear strength of garlic stem and the maximum load of garlic stem were studied by orthogonal rotation combination test design based on Box—Behnken principle.The results showed that the stem diameter and shear angle of the mature garlic test sample had a significant effect on the shear strength of garlic stem,and the loading speed had no significant effect on the shear strength.The moisture content of the test sample had a significant effect on the maximum load of garlic stem,and the stem diameter and loading speed had a significant effect on the maximum load.The optimal parameter combination of shear strength and maximum load of garlic stem was obtained by using Design—Expert 12 software.With the help of Optimization function,the optimal parameters obtained by solving the regression model are that the shear strength of garlic is 1.174 MPa and the maximum load that garlic stem can bear is 90.772 N under the condition of taking the minimum value of shear strength and maximum load.It provides a basic theoretical basis for the development of the key device of garlic harvester.