Linear Viscoelastic Constitutive Equation Of Eucommia Ulmoides Gum With Microscopic Parameters

With the tension of the current international situation,the import of natural rubber as a strategic material is more and more restricted,which has become an important factor that seriously restricts the sustainable and healthy development of China’s rubber industry and related fields.Therefore,the development of the second rubber source is imminent.Eucommia ulmoides gum with its fatigue resistance,easy crystallization,strong insulation and other excellent characteristics,has become the second rubber source of choice.The constitutive equation is the mathematical model of the relationship between the force and the motion of materials,which is the basis of accurately characterizing the mechanical properties of materials and simulating the calculation of materials and products.It is of great significance to establish the constitutive equation of materials.Mechanical properties of the material depends on its microscopic structure,establish material microstructure and macroscopic mechanical properties of quantitative relationship between can clearly on the material design and optimization provides scientific theoretical guidance,this article studies eucommia bark adhesive elastic constitutive equation,and study the Eucommia ulmoides gum microstructure parameters this constitutive equation,the influence of the concrete research content is as follows:(1)DMA+1000 was used to test the dynamic mechanical properties of Eucommia ulmoides gum composites,so as to obtain the dynamic viscoelastic data of Eucommia ulmoides gum composites at different temperatures and frequencies.Based on the principle of equivalent temperature and frequency,the storage modulus and loss modulus in the broadband domain were finally obtained.(2)According to the experimental data of different formulations,the viscoelastic constitutive equation of Eucommia ulmoides gum composites was established based on the Havriliak-Negami(H-N)model,and the relationship between material parameters and crystallinity and carbon black content in the H-N model was established.(3)The RVE model of Eucommia ulmoides gum composites filled with single carbon black particles was established by finite element analysis method.The effects of interface thickness and interface modulus on viscoelastic properties of Eucommia ulmoides gum composites were studied by THE RVE model.(4)According to the finite element analysis results of Eucommia ulmoides gum composites,the relationship between the mechanical properties and interface thickness and the material parameters in the H-N model was studied and established.