Theory And Application Research Of Pulse Shaper In SHPB Experiment

Since the apparatus of SHPB was designed by Kolsky in 1949, it has been applied to studying dynamic mechanical properties of all kinds of materials under different strain rates, and those materials includes metals, concretes, ceramics, rubbers,and composite materials, etc. However, with research scope developing, wave oscillation and others problems caused by two-dimensional effect are much more serious, which has a strong impact on the processing of experimental data and the accuracy of results.At present, a technique of pulse shaper widely used can solve this problem effectively. However, owing to the lack of a systematic study for pulse shaper, the material and size of pulse shaper always be selected by through a large number of experiments or experience. Consequently, experimental data acquired by researchers through different SHPB apparatus are not universal and comparative, causing resources waste and influencing academic exchange.The main contents are as follows: a systematic study of theory, numeration and experiment for pulse shaper is conducted based on improving the SHPB experimental apparatus. And a new method of determining the size of pulse shaper is established to improve the experiment efficiency and the data processing accuracy, and to hopefully solve the universality and the comparability of experimental data.