ISSN: 1945-7553
Page Count: 7

A Microcomputer-Based System for the High-Speed Compression Test by the Split Hopkinson Pressure Bar Technique

Yokoyama, T
Research Associate and Professor, Osaka University, Suita, Osaka,

Kishida, K
Research Associate and Professor, Osaka University, Suita, Osaka,

(Received 14 January 1985; accepted 6 March 1986)

Abstract

A microcomputer-based system has been developed for the high-speed compression test by the split Hopkinson pressure bar technique. The present test system enables one to obtain reliable dynamic stress-strain data for materials for a very short period. The range of strain rates achieved by the test system is approximately 10² to 2 × 10³ s⁻¹ depending on the strength of the material and the impact velocity of a striker bar. The accuracy of the entire test system is checked directly by comparing the static and dynamic test results for a strain-rate insensitive material. Test results are presented for tough pitch copper and two aluminum alloys.

Keywords:
high-speed compression test, split Hopkinson pressure bar, high strain-rate tests, materials testing, microcomputer, data processing, data-acquisition control, interfacing

Paper ID: JTE10335J
DOI: 10.1520/JTE10335J
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