Experiment and analytical model based on slab method for drawing process of core filled tube

Experimental and numerical analyses were performed to predict the deformation parameters of functional powder/solid composite clad rods. There has been a lack of theoretical equations for quantitative analyses of parameters during the deformation of structural powder/solid composite clad rods such as a core filled tube (COFT). In this study, a slab method was adopted to analyze the COFT drawing process, and static equilibrium equations were developed and solved to determine the drawing force, wall thickness and core density. The prediction results of the new equations were compared with experimental results, revealing good agreement between them. Both the equations and the experiments showed the existence of an ultimate relative density of the core material during the COFT drawing process. The influences of the process parameters on the compaction factor and ultimate relative density of the core material were determined using the new equations.