单轴双向加载分离式霍普金森压杆的数据处理方法

This paper presents a bidirectional-load split Hopkinson compression bar (BSHCB), namely, adding other symmetrical incident wave on the basis of traditional split Hpkinson pressure bar (SHPB), the two incident waves would load the specimen synchronously and symmetrically. The data process equations are approached according to the one-dimensional stress wave theory. According to the numerical simulation analyses, it is concluded that the proposed data process equations can determine the engineering stress, engineering strain and engineering strain rate of the tested material in bidirectional-load split Hopkinson compression test. Moreover, compared with the traditional SHPB test, the specimens in bidirectional-load split Hopkinson compression test can reach constant stress state in shorter time, and the strain rate can be improved.