Experimental Study on Split Hopkinson Pressure Bar Pulse-Shaping Techniques for Concrete

2016 ◽  
Vol 28 (5) ◽  
pp. 04015196 ◽  
Author(s):  
Xudong Chen ◽  
Limei Ge ◽  
Jikai Zhou ◽  
Shengxing Wu
Keyword(s):  
Experimental Study ◽  
Pulse Shaping ◽  
Split Hopkinson Pressure Bar ◽  
Hopkinson Pressure Bar ◽  
Split Hopkinson ◽  
Pressure Bar

scholarly journals NUMERICAL MODELLING OF WAVE SHAPES DURING SHPB MEASUREMENT

2019 ◽  
Vol 25 ◽  
pp. 25-31
Author(s):  
Radim Dvořák ◽  
Petr Koudelka ◽  
Tomáš Fíla
Keyword(s):  
Parametric Analysis ◽  
Pulse Shaping ◽  
Split Hopkinson Pressure Bar ◽  
Sensitivity Study ◽  
Hopkinson Pressure Bar ◽  
Pulse Shaper ◽  
Geometric Properties ◽  
Element Size ◽  
Split Hopkinson ◽  
Pressure Bar

The paper aims at the numerical simulation of the wave propagation in compressive Split Hopkinson Pressure Bar (SHPB) experiment. The paper deals with principles of SHPB measurement, optimisation of a numerical model and techniques of pulse shaping. The parametric model of the typical SHPB configuration developed for LS-DYNA environment is introduced and optimised (in terms of element size and distribution) using the sensitivity study. Then, a parametric analysis of a geometric properties of the pulse shaper is carried out to reveal their influence on a shape of the incident pulse. The analysis is algorithmized including the pre- and post-processing routines to enable automated processing of numerical results and comparison with the experimental data. Results of the parametric analysis and the influence of geometric properties of the pulse shaper (diameter, length) on the incident wave are demonstrated.

scholarly journals Numerical study for determination of pulse shaping design variables in SHPB apparatus

2013 ◽  
Vol 61 (2) ◽  
pp. 459-466 ◽  
Author(s):  
P. Baranowski ◽  
J. Malachowski ◽  
R. Gieleta ◽  
K. Damaziak ◽  
L. Mazurkiewicz ◽  
...  
Keyword(s):  
Pulse Shaping ◽  
Split Hopkinson Pressure Bar ◽  
Numerical Study ◽  
Experimental Tests ◽  
Peak Shape ◽  
Hopkinson Pressure Bar ◽  
Design Variables ◽  
Split Hopkinson ◽  
Pulse Peak ◽  
Pressure Bar

Abstract High strain rate experimental tests are essential in a development process of materials under strongly dynamic conditions. For such a dynamic loading the Split Hopkinson Pressure Bar (SHPB) has been widely used to investigate dynamic behaviour of various materials. It was found that for different materials various shapes of a generated wave are desired. This paper presents a parametric study of Split Hopkinson Pressure Bar in order to find striker’s design variables, which influence the pulse peak shape in the incident bar. With experimental data given it was possible to verify the developed numerical model, which was used for presented investigations. Dynamic numerical simulations were performed using explicit LS-Dyna code with a quasi-optimization process carried out using LS-Opt software in order to find striker’s design variables, which influence the pulse peak shape.

Compression Tests of Polycarbonate under Quasi-Static and Dynamic Loading

2013 ◽  
Vol 442 ◽  
pp. 125-128
Author(s):  
Wen Jun Hu ◽  
Xi Cheng Huang ◽  
Fang Ju Zhang ◽  
Yong Mei Chen
Keyword(s):  
Pulse Shaping ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Compression ◽  
Compression Tests ◽  
Hopkinson Pressure Bar ◽  
Static Behavior ◽  
Experimental Conditions ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
Static And Dynamic Loading

Strain rate response of polycarbonate was investigated under uniaxial compression at different rates of strain ranging from 0.0001/sec to about 8200/sec and different temperature ranging from 145k to about 423k. A split Hopkinson pressure bar was used to determine the dynamic compressive responses. A pulse-shaping technique was employed in dynamic compression experiment to ensure that valid experimental conditions were satisfied. Results show that, compared with quasi-static behavior, dynamic compression results in significantly higher compressive strengths for polycarbonate materials.

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