Numerical Investigation of the Stress Wave Propagation in the Incident Bar and the Specimen

Abstract

Hopkinson pressure bar apparatus is extensively used for the measurement of the dynamic fracture properties. For accurate measurement of the dynamic fracture properties we need to understand concepts and principles associated with the test setup. The understanding of stress wave in the bar and specimen is also very important. In the current work, ANSYS LS-DYNA software is used to simulate the propagation behavior of the time based loading and generation of stress wave. The stress and strain plots in the specimen and the incident bar are obtained as an output of the analysis. The analysis of the plots suggest that, for the same time duration the rising trend is observed for the plots of stress and strain of incident bar whereas a sine wave trend is observed for the plots in the specimen.

Numerical simulation of dynamic fracture toughness tests: using RKR criterion

“…The concepts and principles associated with SHPB are discussed for the measurement of dynamic fracture properties of materials. The propagation behavior of the time based loading and generation of stress wave has been explored using finite element method [2,14,15].…”