Advancements in the Split Hopkinson Bar Test
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منابع مشابه
Effect of structurally-induced lateral confinement on split Hopkinson pressure bar test specimens of concrete-like materials
In dynamic testing of concrete-like materials, there is a need in distinguishing structural effects from genuine strainrate effects. In this paper, this generic problem is studied by numerical simulations based on a phenomenological material model available in the commercial finite element (FE) code Abaqus. The numerical results show that the increase of the dynamic increase factor (DIF) with t...
متن کاملApplication of the Split Hopkinson Resonant Bar test for seismic property characterization of hydrate-bearing sand undergoing water saturation
Conventional resonant bar tests allow the measurement of seismic properties of rocks and sediments at low frequencies (several kilohertz). However, the tests require a long, slender sample which is often difficult to obtain from the deep subsurface and weak and fractured formations. We present an alternative low-frequency measurement technique to the conventional resonant bar tests. This techni...
متن کاملStress 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...
متن کاملFracture Analysis of High Strain Rate Torsion Samples of Aluminium Zinc Magnesium Copper Alloy
All materials have been historically tested at static loading conditions. With the advent of technology, the study of behaviour of materials at high strain rate was done using various methods. The principle of split Hopkinson bar was used to study high strain rate of material in the range of 102s-1 to 103s-1. Split Hopkinson bars were designed for all three modes of deformation and extensively ...
متن کاملUsing 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...
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تاریخ انتشار 1998