Analysis,modeling And Application Of Giant Juncao

Giant Juncao belongs to the angiosperm,is a plant with development and utilization value,mainly used for the cultivation of edible fungi and medicinal bacteria,but also as an energy substance.The advantages of easy survival,high growth rate,and low planting conditions of the Giant Juncao grass make it more and more widely used.With the expansion of the scope of the use of fungi,the demand for fungus culture medium is increasing,and it has become a research focus to realize the crushing of the stems of the Giant Juncao.At present,the development of the Giant Juncao grinder is relatively small,which affects the processing of the subsequent finished product of the Giant Juncao.A study on the mechanical properties of the stem,xylem,and phloem of the Giant Juncao was conducted in order to establish a mechanical model and constitutive relationship.In this paper,the elasticity test method of composite materials was used to test the different parts and components of the Giant Juncao,such as tensile,bending,radial pressure,and axial compression.All the elastic parameters were obtained.The SPSS software was used to analyze the maximum,minimum and average values of various parameters of the stems.The results verified that the stems of the Giant Juncao were in accordance with the characteristics of the composite material,and the corresponding constitutive relations were established with the average of the engineering constants.Combining the constitutive relationship obtained from the test of stems of the Giant Juncao and the use of ANSYS to analyze the axial compression and radial compression of the stem and xylem model of the Giant Juncao,the force condition under pressure was obtained.The whole structure suitable for the compression and comminution of the Giant Juncao was designed,the crushing method and the crushing process were analyzed,and the static analysis and modal analysis of the pressure roller and spindle were performed to verify the rationality of the design of this mechanism.The LS-DYNA software was used to analyze the dynamic simulation of the tool in the crushing process.By comparing and analyzing the effects of cutting the stem directly and crushing it before crushing,the crushing can reduce the stress of the cutter.And it has great practical significance for the research and development of the crushing mechanism.The main conclusions are:(1)Establish a constitutive equation of the Giant Juncao.(2)By selecting different components as the research object,the average elastic moduli 163.168 MPa and 31.874 MPa of radial pressure and axial pressure of the Giant Juncao stalk were obtained;the average elastic modulus of the xylem axial compression and radial pressure is 162.544 MPa and 28.538 MPa.The average elastic modulus of phloem axial pressure and radial pressure is 45.981 MPa and 17.971 MPa;the average elastic modulus of core axial pressure and radial pressure is 2.109 MPa and 1.723 MPa.(3)Using SPSS for analysis.The analysis shows that there is no significant difference between the mechanical elastic parameters obtained from the whole straw compression test is 163.168MPa and the mechanical elastic parameters obtained from the xylem compression test is 162.544 MPa,that is,the load bearing effect of the whole stalk is similar to that of the xylem;the radial compressive elastic modulus is 31.874 MPa and the maximum compressive strength of the whole stalk is 8.911MPa which are much smaller than the axial compressive elastic modulus is 163.168MPa and the maximum compressive strength is 20.858MPa.(4)The static simulation analysis was carried out by ANSYS to analysis axial compression and radial compression.Using the parameter design grinder,through static and dynamic simulation analysis,the static analysis of spindle and dynamic simulation of tool roller are carried out.Which can verify the test results and the accuracy of the mechanism design,and provide a theoretical basis for the development of crushing methods and crushing mechanism.