Crack initiation at high loading rates applying the four-point bending split Hopkinson pressure bar technique

A Tensile Split Hopkinson Bar for Testing Particulate Polymer Composites Under Elevated Rates of Loading

A tensile split Hopkinson bar apparatus is developed for testing high strain rate behavior of glass-filled epoxy. The apparatus uses a specimen gripping configuration which does not require fastening and/or gluing and can be readily used for castable materials. Details of the experimental setup, design of grips and specimen, specimen preparation method, benchmark experiments, and tensile respon...

Using the split Hopkinson pressure bar to validate material models.

This paper gives a discussion of the use of the split-Hopkinson bar with particular reference to the requirements of materials modelling at QinetiQ. This is to deploy validated material models for numerical simulations that are physically based and have as little characterization overhead as possible. In order to have confidence that the models have a wide range of applicability, this means, at...

Stress Equilibrium in the Split Hopkinson Pressure Bar Test

The compressive split Hopkinson pressure bar (SHPB) technique allows the stresses on each end of the specimen to be measured individually. Results are presented showing a large difference between these end pressures, depending on specimen length and loading rate. The mechanisms responsible are shown to be a combination of inertial forces and non-uniform deformation due to wave propagation. Impl...

Software Application for Characterization of Viscoplastic Behavior of Metals at High Strain Rates Using Split Hopkinson Pressure Bar Data

Although SHPB represent the most popular technique for material behavior characterization at moderate and high strain rates, there are few issues concerning data acquisition, as noise or wave dispersion and material model parameters fitting by least squares methods. The paper presents the most relevant steps used in SHPB data processing included in a “user friendly” application dedicated to SHP...

Advancements in the Split Hopkinson Bar Test