An Elastic-Plastic Heat Transfer Model of Two Asperities Contact Under Consideration of Shoulder-Shoulder Contact and Tangential Sliding

In order to accurately predict the interface heat transfer behavior during hot metal forming process, this paper proposes an elastic-plastic deformation heat transfer model after considering shoulder-shoulder contact asperities in tangential sliding conditions. By the volume conservation principle of the material during plastic deformation, the contact heat transfer of a single pair asperities in shoulder-shoulder contact and tangential sliding is analyzed. Based on asperity elastic-plastic deformation theory, the relationship between the load and the spherical asperities shoulder-shoulder contact elastic-plastic deformation pattern on the rough contact surface is analyzed and contact heat transfer model of the single pair spherical asperities under elastic-plastic deformation is established, and comparison of the proposed model and the finite element method and to verify is completed to verify its accuracy. Results show that the forecast results by the proposed model is close to FEM simulation results under the condition of fully plastic contact. The shoulder-shoulder contact asperities heat transfer coefficient increases with increase of the load. The coefficient increases with increases of the sliding displacement and friction heating. © 2017, Shanghai Jiao Tong University Press. All right reserved.