激波管聚酯膜片变形过程分析

In order to investigate the effect of diaphragms thickness and combination on the maximum bearing pressure, the shock tube experiment was conducted on the PET diaphragms with different thicknesses. Two high-speed cameras were used to capture and record the whole deformation process of the PET diaphragms. The diaphragms displacement field at different moments were obtained by 3D-DIC. An unusual interesting phenomenon was observed that the diaphragms were recurved and then dramatically ruptured, and thus the diaphragm defamation was divided into two stages. The diaphragms deformation of any thickness in the first stage, and the shape characteristic of the diaphragm recurvation in the second stage as well as the thickness variation during the whole process were analyzed.