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Effects of imperfect experimental conditions on stress waves in SHPB experiments

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文摘 Experimental and numerical simulations were undertaken to estimate the effects of imperfect conditions on stress waves in split Hopkinson pressure bar (SHPB) experiments. The photonic Doppler velocimetry (PDV) measurement results show that the rise and fall times of an incident wave increases with an increasing inclination angle; also, the fluctuations of the incidentwave disappear gradually with the increase of inclination angle. The following characteristics for various defects in the SHPB were obtained by numerical simulation: (1) the influence of a curved bar was negligible; (2) misalignment modestly affects the fluctuation characteristics, and bending waves were generated at this condition; (3) inclination and indentation of the impact endsurface had a great impact on the incident waves, and both of them increase the rise time of the incidentwave by increasing the degree of defects. In view of the results, misalignment, inclination, and indentation in SHPB experiments should be minimized.
来源 Acta Mechanica Sinica ,2015,31(6):827-836 【核心库】
DOI 10.1007/s10409-015-0439-0
关键词 Imperfect experimental conditions ; SHPB experiments ; Stress waves ; PDV measurement ; Numerical simulation
地址

Institute of Mechanics, Chinese Academy of Sciences, Key Laboratory of Mechanics in Fluid Solid Coupling Systems,Chinese Academy of Sciences, Beijing, 100190

语种 英文
文献类型 研究性论文
ISSN 0567-7718
学科 力学
基金 国家自然科学基金
文献收藏号 CSCD:5596376

参考文献 共 36 共2页

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