Research On Finite Element Numerical Simulation Of Mechanical Properties Of Conical Metal Rubber Shock Absorbers

Metal and non-metallic parts are joined together by mechanical or thermal means.Since the adhesive joint has less stress concentration source,uniform load distribution and good fatigue performance,the bonding process is widely used in engineering structural design.Adhesives fail due to time-dependent creep mechanisms,and mechanical fasteners typically fail due to cycle-dependent fatigue mechanisms.Bonding is the most important part of this kind of product.The bonding agent is a good interface transition layer material between metal and rubber,and the bonding strength directly affects the strength and service life of the bonding structure.Therefore,it is of great theoretical significance and engineering application value to study the interfacial bonding strength and failure mode of adhesives and adherends.Based on the overview of bonding theory,joint strength theory and testing technology of bonding parts,rubber constitutive model and its selection strategy,cohesion model and its theory,this paper takes a tapered metal rubber shock absorber as the research object and carries out constant displacement.The finite element numerical simulation of the fatigue life of rubber members under the condition of load and deformation under the condition of load and deformation of rubber components of tapered metal rubber shock absorbers.The research results are as follows:(1)Under the condition of limited displacement load,according to the load-displacement data of the rubber-free rubber component,the linear regression analysis of the load-displacement data is carried out by using the stiffness equation without initial pre-compression and initial pre-compression.The rigidity of the rubber-free rubber component of the metal rubber shock absorber predicted by the stiffness equation of the initial pre-compression amount is larger than that of the non-pre-compressed rubber component,and the stiffness equation considering the initial pre-compression amount can better describe the rubber-free rubber component.Forced deformation behavior.(2)Compared with the Mises equivalent stress distribution diagram of the rubber component without rubber layer,the Mises equivalent stress of the rubber component with rubber layer fluctuates with the axial distribution of the rubber,indicating that a suitable thickness of rubber is added between the rubber rubber.After the layer,the stress in the rubber member tends to be evenly distributed.(3)Under the condition of cyclic displacement load,the strain amplitude and strain mean of the rubber component with rubber layer are smaller than the strain amplitude and strain mean of the rubber component without rubber layer;The strain amplitude and strain mean ofthe rubber member increase as the thickness of the rubber layer increases.(4)Numerical simulation studies on tapered metal rubber shock absorbers show that the fatigue life of the rubber component with rubber layer is much longer than that of the rubber component without rubber layer.Therefore,adding the rubber layer can effectively improve the taper.The fatigue life of metal rubber shock absorbers.