Finite Element Analysis of Twist Rate Role in High Pressure Torsion Process

Authors

1 Mechanical Engineering Department, Faculty of Engineering, Razi University, Kermanshah, Iran

2 Materials and Textile Engineering Department, Engineering Faculty, Razi Universty, Kermanshah, Iran,

10.22044/jsfm.2025.16515.3993

Abstract

The main goal of this work was to partially fill the existing knowledge gap concerning the twiste rate sensitivity of plain carbon steed severe plastic deformed by high pressure torsion(HPT) process. In this regard the twist rate effect on torque-twist angle curve, maximum torque and failure equivalent strain was investigated using finite element analysis (FEA) with Abaqus software. The mechanical properties, flow stress equation, initial pressure of 300 MP and five different twist rates from 0.5 rad/s to 4 rad/s were aused as input data in the modeling of the HPT process. According to obtained results, the torque-twist angle diagram shifted towards lower values with increasing twist rate. The twiste rate sensitivity index was negative and depended on twist angle as M=-0.018φ. The modified Johnson-Cook equation was an excellent fit to the all torque-twist angle curves. The maximum torque and failure equivalent strain initially increased from 1177 to 1357 N.m and from 1.25 to 2.80, respectively, by increasing twist rate to 2 rad/s, and then decreased to1209 N.m and 2.63, respectively. The maximum value of failure equivalent strain obtained with FEA was 22%, 61% and 104% higher than the values calculated using von Mises, modified Hencky and Degtyarev equations, respectively.

Keywords

Main Subjects

References

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Journal of Solid and Fluid Mechanics
Volume 15, Issue 4
September and October 2025
Pages 13-26

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