DATA-PROCESSING IN THE SPLIT HOPKINSON PRESSURE BAR TESTS

被引：199
作者：
LIFSHITZ, JM
LEBER, H
机构：
[1] Material Mechanics Laboratory, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa
来源：
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 1994年 / 15卷 / 06期
关键词：
D O I：
10.1016/0734-743X(94)90011-9
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect on dynamic stress-strain curves of dispersion and shifting of elastic strain pulses travelling in a split Hopkinson pressure bar is reported. The dispersion correction is done in the frequency domain after employing FFT algorithm by adjusting the phase of each Fourier component. The three pulses (incident, reflected and transmitted) are analyzed inside three identical windows that propagate along the time axis with a reference velocity c0 = square-root E/rho. The oscillations in the dynamic stress-strain curves are shown to be very sensitive to small variations in the value of c0. A calibration procedure for determining the value of c0 for each SHPB setup is suggested. The predictions are compared to experimental measurements.
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页码：723 / 733
页数：11
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