Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
797620 | Mechanics of Materials | 2012 | 17 Pages |
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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Authors
F. Gallo, S. Satapathy, K. Ravi-Chandar,