Mechanical Properties On Construction Of Assembly Model And Finite Element Analysis For Brake Rubber Hose

Brake hose is widely used in automobile industry because of its high pressure strength,small pressure deformation and acid and alkali resistant medium.However,the performance of the brake hose and its assembly is related to the mechanical properties of the fiber,rubber,metal materials and other factors,which limits its optimization and development.In this paper,the material of each component of the brake hose assembly is tested,the mechanical properties of the fiber braid are solved by the finite element analysis method,and the high-precision brake hose model is constructed.The different factors that affect the performance of the assembly are explored through the simulation of the buckling process.The research contents of this paper include:(1)Test the mechanical properties of the materials that make up the rubber tube and its assembly.Taking the brake hose and its assembly as the research object,the mechanical properties of different components of the assembly,such as rubber hose and metal joint,are analyzed respectively.The initial modulus of single fiber,the constitutive equation of rubber and the yield stress of joint metal were determined.(2)Solve the equivalent mechanical parameters of the fiber braid of the brake hose.Taking the braid of brake hose as the research object,the fiber mechanical property parameters obtained in(1)are used to model the braid of brake hose.At the same time,the second development of the modeling plug-in housebraider is used to solve the orthotropic mechanical parameters of fiber braid,and the validity of the equivalent mechanical material parameters of fiber braid is verified by experiments and finite element simulation analysis.(3)Build the model of high precision brake hose and assembly and deploy the simulation analysis of the fastening process.Based on the orthotropic constitutive equation of fiber braided layer and the constitutive equation of material parameters and rubber,a high-precision brake hose model is constructed.Combined with the mechanical properties of metal materials obtained in(1),the modeling and Simulation of the hose assembly fastening process is realized.Using the boundary conditions of practical production,the stress concentration and the contact pressure distribution on the surface of the rubber tube and the liner core are solved.(4)Study on the factors influencing the sealing performance of brake hose assembly.Taking the contact pressure between the outer rubber layer and the metal joint of the brake hose as the research object,based on the simulation of the clamping process of the hose assembly in(3),the stress distribution of the hose,the contact pressure between the liner core and the inner rubber layer of the hose,and the influence of the three factors on the sealing performance and the pull-out resistance of the hose are analyzed.The rationality of simulation analysis is verified by impulse test,which provides guidance for DOE design of enterprises.