Abstract
This paper presents an overview of the custom design instrumentation of a Split Hopkinson Pressure Bar modified for dynamic testing of materials with low mechanical impedance, particularly for cellular metallic materials (e. g. metal foams, laser sintered structures). Design and implementation of the components related to the strain wave measurement based on strain gauges (i.e. strain-gauge measurement unit, power supply unit, filtration) and the components used for the control and synchronization of the experiment, such as module of laser trough-beam photoelectric sensor are summarized in the paper. Aside from the design of the hardware components, the contribution deals also with development of a control software with graphical user interference using LabView (National Instruments, USA) programming environment, that allows selection of parameters of the dynamic tests and their storage for the evaluation of experiments.
Highlights
MotivationThe mechanical properties of specific metal structures may interest some researchers and engineers because their various behavior at different loading rates
In terms of mechanical behavior, it has been observed that the stress-strain response is closely linked to variation in loading rates
It is required to be described material response for loading rates that can be expected after initiation in service [1, 2]
Summary
The mechanical properties of specific metal structures may interest some researchers and engineers because their various behavior at different loading rates. In terms of mechanical behavior, it has been observed that the stress-strain response is closely linked to variation in loading rates. It is required to be described material response for loading rates that can be expected after initiation in service [1, 2]. The Split Hopkinson Pressure Bar (SHPB) apparatus has rapidly become the widely used device for material testing at high strain rates [3]. One of the directions in current research using SHPB is the testing of porous structures with regular or irregular internal structure [4,5,6]. Ye et al [7]
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