Plastic deformation in electrical conductors subjected to short-duration current pulses |
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| Affiliation: | 1. Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712-0235, USA;2. Institute for Advanced Technology, The University of Texas at Austin, Austin, TX 78712-0235, USA;1. Graduate School of System Design, Tokyo Metropolitan University, 6-6, Asahigaoka, Hino-shi 191-0065, Tokyo, Japan;2. Komatsuseiki Kosakusho. Co., Ltd., 942-2, Siga, Suwa-city 392-0012, Nagano Prefecture, Japan;1. Institute of Forming Technology & Equipment, Shanghai Jiao Tong University, Shanghai 200030, China;2. General Motor Chinese Science Laboratory Institute, Shanghai 201206, China;1. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150080, China;2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;3. Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208, USA |
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| Abstract: | In this paper, we consider the viscoplastic response of Al 6061-T6 and Cu-102 when subjected to a combination of mechanical load and high-intensity electric current. The specimens are subjected to mechanical loading under fixed-grip and dead-load conditions; in addition, the specimen is subjected to a nearly sinusoidal current pulse (frequency 4 kHz, duration ∼1 ms, and intensity ∼109 A/m2). The resulting temperature increase causes the yield stress to drop and enables accumulation of plastic strain. A viscoplastic model is used to simulate the process; comparisons of the simulation results to time resolved measurements of strain and temperature are used to calibrate the viscoplastic model. |
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