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http://dx.doi.org/10.3795/KSME-A.2002.26.5.924

Parameter Study of Impact Characteristics for a Vacuum Interrupter Considering Dynamic Material Properties  

Lim, Ji-Ho (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Song, Jeong-Han (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Huh, Hoon (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Park, Woo-Jin (The Power Research Center of LG Cable)
Oh, Il-Seong (The Power Research Center of LG Cable)
Ahn, Gil-Young (The Power Research Center of LG Cable)
Choe, Jong-Woong (The Power Research Center of LG Cable)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.5, 2002 , pp. 924-931 More about this Journal
Abstract
Vacuum interrupters in order to be used in various switch-gear components such as circuit breakers, distribution switches, contactors, etc. spread the arc uniformly over the surface of the contacts. The electrodes of vacuum interrupters are made of sinter-forged Cu-Cr materials for good electrical and mechanical characteristics. Since the closing velocity is 1-2m/s and impact deformation of the electrode depends on the strain rate at that velocity, the dynamic behavior of the sinter-forged Cu-Cr is a key to investigate the impact characteristics of the electrodes. The dynamic response of the material at the high strain rate is obtained from the split Hopkinson pressure bar test using disc-type specimens. Experimental results from both quasi-static and dynamic compressive tests are Interpolated to construct the Johnson-Cook model as the constitutive relation that should be applied to simulation of the dynamic behavior of the electrodes. The impact characteristics of a vacuum interrupter are investigated with computer simulations by changing the value of five parameters such as the initial velocity of a movable electrode, the added mass of a movable electrode, the wipe spring constant, initial offset of a wipe spring and the virtual fixed spring constant.
Keywords
Split Hopkinson Pressure Bar; Vacuum Interrupter; Strain Rate Hardening; Chattering;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Johnson, G. R. and Cook, W. H., 1983, 'A Constitutive Model and Data for Metals subjected to Large Strains, High Strain Rates and High Temperatures,' in Proceedings of the Seventh International Symposium on Ballistics, The Hague, The Netherlands, pp. 541-547
2 Meyers, M. A., 1994, Dynamic Behavior of Materials, John Wiley & Sons, New York
3 Barkan, P., 1966, 'A Study of the Contact Bounce Phenomenon,' IEEE Transactions on Power Apparatus an Systems, Vol. pas-86, No. 2, pp. 231-240   DOI   ScienceOn
4 Kolsky, H., 1963, Stress Waves in Solids, Dover publications, New York, pp. 41-98
5 Kang, W. J., Cho, S. S., Huh, H. and Chung, D. T., 1998, 'Identification of Dynamic Behavior of Sheet Metals for an Auto-body with Tension Split Hopkinson Bar,' SAE Int. Congress, Detroit, U.S.A.