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Finite Element Analysis of the Bending Behavior of a Workpiece in Equal Channel Angular Pressing
윤승채,Anumalasetty Venkata Nagasekhar,김형섭 대한금속·재료학회 2009 METALS AND MATERIALS International Vol.15 No.2
For the first time, a detailed and systematic finite element study was carried to identify the parameters which cause the bending of the workpiece in equal channel angular pressing. These simulations were carried out by using commercial finite element code Abaqus with different materials behavior, processing parameters, and die geometries. The results showed that the optimal ways to reduce the bending of strain rate sensitive materials in ECAP without varying the strain homogeneity are the usage of lower processing speed and the increase in length of the die exit-channel. For the first time, a detailed and systematic finite element study was carried to identify the parameters which cause the bending of the workpiece in equal channel angular pressing. These simulations were carried out by using commercial finite element code Abaqus with different materials behavior, processing parameters, and die geometries. The results showed that the optimal ways to reduce the bending of strain rate sensitive materials in ECAP without varying the strain homogeneity are the usage of lower processing speed and the increase in length of the die exit-channel.
Deformation Characteristics Evaluation of Modified Equal Channel Angular Pressing Processes
Yoon, Seung Chae,Nagasekhar, Anumalasetty Venkata,Yoo, Ji Hoon,Abd El Aal, Mohamed Ibrahim,Vaseghi, Majid,Kim, Hyoung Seop The Japan Institute of Metals 2010 MATERIALS TRANSACTIONS Vol.51 No.1
<P>In current studies, equal channel angular pressing process (ECAP) and modified ECAP processes are simulated under ideal conditions to compare the deformation characteristics. The deformation behaviour is more complicated and the strain induced during the processes is highly non-uniform in the modified ECAP processes except in the equal channel multi-angular pressing (ECMAP) process with Route C. The strain homogeneity is more of a possibility with ECAP and ECMAP with Route C processes. The deformation stress state is widely distributed in nature in modified ECAP processes than in conventional ECAP. In addition, the load requirements are also higher in modified ECAP processes with that of the ECAP process.</P>