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http://dx.doi.org/10.9725/kstle.2011.27.3.140

Development of a Miniature Pendular Type Impact Testing Machine Using a Magnetic Powder Brake  

You, In-Dong (Graduate School of Railroad, Seoul National University of Science and Technology)
Lee, Man-Suk (Department of Automotive Engineering, Seoul National University of Science and Technology)
Kim, Ho-Kyung (Department of Automotive Engineering, Seoul National University of Science and Technology)
Publication Information
Tribology and Lubricants / v.27, no.3, 2011 , pp. 140-146 More about this Journal
Abstract
A miniature pendular type impact testing machine was designed and developed, adopting a magnetic powder brake in order to investigate tensile and shear behavior of a small solder ball at high speed. In this testing system, the potential energy of the pendulum is transferred into the impact energy during its drop. Then, the impact energy is transmitted through the striker which is connected to the push rods to push the specimen for tensile loading. The tensile behavior of lead-free solder ball in diameter of 760 ${\mu}m$ was successfully investigated in a speed range of 0.15 m/s~1.25 m/s using this designed device. The maximum tensile strength of the solder joint decreases with the loading speed in the testing condition. The maximum tensile strength of the joint was 56 MPa in the low speed region.
Keywords
impact tensile test; lead-free solder ball; loading device; magnetic powder brake;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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