Importance of machine compliance to quantify electro-plastic effect in electric pulse aided testing: An experimental and numerical study

Adabala, Subrahmanyam and Cherukupally, Shivaprasad and Reddy, N Venkata and et al, . (2022) Importance of machine compliance to quantify electro-plastic effect in electric pulse aided testing: An experimental and numerical study. Journal of Manufacturing Processes, 75. pp. 268-279. ISSN 1526-6125

Text
Journal_of_Manufacturing_Processes.pdf - Published Version
Restricted to Registered users only
Download (2MB) | Request a copy

Abstract

Electric pulse aided deformation (EPAD) of metals reduces the flow stress due to both thermal (expansion as well as softening) and electro-plastic (EP) effects. To quantify the electro-plastic effect during pulse application, close prediction of stress-drop due to thermal effects is very important. Testing machine relaxes due to sudden drop in stress at the instant of pulse application and this aspect must be considered in deformation analysis of the predictive methodology to accurately estimate the stress-drop. Coupled electro-thermo-mechanical finite element analysis by incorporating the testing machine stiffness is carried out during the present work to estimate the stress-drop due to thermal effects and validated. Results indicate that the testing machine stiffness significantly influences the stress-drop. In addition, experimental and numerical studies carried out during the present work explain the role of relative rate of deformation and thermal expansion during pulse application to quantify the EP effect. In the present work, cold-rolled and annealed automotive (C–Mn 440) steel is used and there is a reasonable EP effect. © 2022 The Society of Manufacturing Engineers

[error in script]

IITH Creators:

IITH Creators	ORCiD
Reddy, N Venkata	UNSPECIFIED

Item Type:

Article

Additional Information:

Authors would like to thank MHRD (Government of India), DHI (Government of India) and Tata Steel Ltd. for the financial support under Uchhatar Avishkar Yojana (UAY).

Uncontrolled Keywords:

Deformation and thermal expansion rates; Electro plasticity; Experimental and numerical study; Machine compliance

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

20 Jul 2022 11:39

Last Modified:

20 Jul 2022 11:39