Finite Element Simulations of the Effective Train in Monotonic and Cyclic High Pressure Torsion Procedures
نویسندگان
1 Department of Mechanical Engineering, Razi University, Kermanshah, Iran.
2 Department of Materials and Textile Engineering, Razi University, Kermanshah, Iran.
3 Department of Mechanical Engineering, Razi University, Kermanshah, Iran.
doi
10.22084/jrstan.2025.29720.1261چکیده
No study has comparatively examined the impact of compressive loads in monotonic and cyclic high-pressure torsion (mHPT and cHPT) using the finite element analysis (FEA). This study aimed to overcome this lack of knowledge. For this purpose, the effect of compressive load on the saturated torque and effective strain imposed by mHPT and cHPT processes was investigated by finite element analysis of copper samples, under pressures of 100MPa and 150MPa and at three twist angles. The results demonstrated that in the mHPT process due to the increase in the compressive load the values of the effective strain and the maximum torque increased from 5.58 and 983N.m to 6.85 and 1967N.m, respectively. In contrast, the value of the effective strain imposed by cHPT ranged from 27.3 to 100.4 as the applied pressure-twist angle amplitudes increased from 100 MPa-1 rad to 150MPa-3 rad, respectively. Regardless of the applied load in mHPT, as the twist angle increased from about 1 rad to nearly 15 rad, the moment increased with a constant slope. In the cHPT procedure, the torque value was nearly independent of the number of cyclic revolutions, but it increased as the applied pressure and twist angle amplitudes increased. A 50% increase in applied load led to ∼23% and ∼88% increases in effective strain imposed by the mHPT and cHPT processes.
