Dynamic response of Hastelloy ® X plates under oblique shocks: Experimental and numerical studies

Abstract

53The dynamic behavior of Hastelloy ® X plates subjected to normal and oblique shock 54 loading was studied both experimentally and numerically. A series of experiments was 55 conducted on Hastelloy ® X plates at room temperature under fixed boundary conditions using a 56 shock tube apparatus. High-speed digital cameras were used to obtain the real-time images of the 57 specimen during the shock loading. Digital Image Correlation (DIC) technique was utilized to 58 obtain 3D deformations of the plates using stereo-images of the specimen. The numerical 59 modeling utilized the finite element software package Dynamic System Mechanics Analysis 60 Simulation (DYSMAS) which includes both the structural analysis as well as the fluid-structure 61 interaction to study the dynamic behavior of the specimen under given loads. Experimentally 62 obtained pressure-time profiles were used as a reference in numerical modeling. It was observed 63 that the lower angles of shock incidence caused more deformation on the specimen. Additionally 64 for oblique shocked specimens, the deformation was observed to initiate from the edge nearer to 65 the muzzle. The results from the numerical simulations were validated with the experimental 66 data, and showed excellent correlation for all cases. 67 68 69 70 71 72 73 74 75 M