| 刘苗苗,郭伟国*,周平.基于SHPB波传播系数法试验的衰减弥散修正研究[J].实验力学,2014,29(2):181~188 |
| 基于SHPB波传播系数法试验的衰减弥散修正研究 |
| Wave Attenuation-dispersion Correction Study Based on SHPB Test and Wave Propagation Coefficient Method |
| 投稿时间：2013-06-13 修订日期：2013-11-09 |
| DOI：10.7520/1001-4888-13-094 |
| 中文关键词: 分离式霍普金森杆(SHPB)试验 波传播系数 弥散修正 原位测试 |
| 英文关键词:split Hopkinson pressure bar (SHPB) wave propagation coefficient dispersion correction in-situ test |
| 基金项目:陕西省科学技术资助国际合作项目(2013KW13-02) |
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| 中文摘要: |
| 针对SHPB试验中的波传播衰减弥散问题，基于杆自由端撞击的波传播系数法试验原理，选取Φ100mm PA66尼龙杆为典型Hopkinson压杆，依据SHPB试验中获取试样应力-应变曲线的二波法，对原位测试试验中从加载试样传来的反射波弥散进行修正研究，获得入射杆反射波传播系数；同理，对透射杆获取透射波传播系数。根据修正后的实际反射波和透射波历程，获得试样的应力-应变曲线。通过比较分析，此方法合理可靠。 |
| 英文摘要: |
| In order to investigate the wave propagation attenuation and dispersion in experiment, based on experimental principle of wave propagation coefficient determined by free end impact test of Hopkinson bar，selecting Φ100mm-PA66 nylon bar as a typical Hopkinson pressure bar, according to two-wave method applied in SHPB experiment to obtain stress-strain curve of spesimen, the dispersion correction of reflected wave passes from loaded specimen in in-situ experiment was studied, and the reflected wave propagation coefficient of incident bar was obtained. Similarly, the transmitted wave propagation coefficient of transmitted bar was also obtained. The stress-strain curve of spesimen is obtained based on the corrected actual reflected and transmitted wave profiles. After comparing and analyzing, this method is proved to be reasonable and reliable. |
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