Numerical Study of the Effects of Joint Interface on Two Cylinders

摘要

The main objective of this study is to analyze the influence of joint interface on mechanical behavior of two cylinders by modeling different geometry with Finite Element Method (FEM). The structures are continuum model (CM), joint interface model with different materials (JIM1) and joint interface model with same materials (JIM2). The displacement-load relationship, equivalent plastic strain (EPS), deformation and contact pressure based on three models are gained. FEM results indicate that under the same load, the displacements of three models are various in loading and unloading processes. The EPS_(CM) is relative stable originally and then decerase quickly while the EPS_(JIM1) and EPS_(JIM2) grow rapidly and fall slowly later. The deformation of CM, JIM1 and JIM2 under 300Mpa are 62.5μm, 33μm and 68.13μm respectively. The contact pressure of JIM1 is smaller than JIM2. The effects of frictional coefficients (vary from 0 to 1.0) on deformation and contact pressure are also investigated. Results show that joint interface make the structure's behaviors different compared with continuum structure and this study can provide reference for the design of structures with joint interface in machinery.