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International Journal of Nonlinear Sciences and Numerical Simulation

Editor-in-Chief: Birnir, Björn

Editorial Board: Armbruster, Dieter / Bessaih, Hakima / Chou, Tom / Grauer, Rainer / Marzocchella, Antonio / Rangarajan, Govindan / Trivisa, Konstantina / Weikard, Rudi

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2191-0294
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Volume 16, Issue 3-4

Issues

Experimental and Numerical Analysis of Qinling Mountain Engineered Rocks during Pulse-Shaped SHPB Test

Shi Liu
  • Corresponding author
  • Aeronautics and Astronautics Engineering College, Air Force Engineering University, Xi′an 710038, China
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/ Jinyu Xu
  • Aeronautics and Astronautics Engineering College, Air Force Engineering University, Xi′an 710038, China
  • College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi′an 710072, China
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Published Online: 2015-05-20 | DOI: https://doi.org/10.1515/ijnsns-2014-0039

Abstract

In order to study the dynamic compression mechanical properties of engineering rock under high strain rate (100~102 S−1)loads, dynamic compression tests of three common engineering rocks (marble, sandstone and granite) taken from the Qinling Mountain are studied subjected to five different kinds of shock air pressure using Φ 100 mm split Hopkinson pressure bar test system improved with purple copper waveform shaper. The dynamic compression stress-strain curves, dynamic compressive strength, peak strain, energy absorption rate and elastic modulus of three rocks variation with strain rate are researched. The dynamic compression failure modes under different strain rates are analyzed. Then the three-dimensional numerical simulations of waveform shaper shaping effects and stress wave propagation in the SHPB tests are carried out to reproduce the test results. The research results show that the dynamic compression stress-strain curves show certain discreteness, and there is an obvious rebound phenomenon after the peak. With the increase in strain rate, the dynamic compressive strength, peak strain and energy absorption rate are all in a certain degree of increase, but the elastic modulus have no obvious change trend. Under the same strain rate, the dynamic compressive strength of granite is greatest while of sandstone is least. With the increase in strain rate, the margin of increase in peak strain and energy absorption rate of granite is greatest while of sandstone is least. The failure modes of the sample experience a developing process from outside to inside with the increase of strain rate.

Keywords: Qinling Mountain rock; Numerical analysis; Split hopkinson pressure bar; Experimental research

PACS® (2010): 62.20.Fe.

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About the article

Received: 2014-03-15

Accepted: 2015-04-20

Published Online: 2015-05-20

Published in Print: 2015-06-01


Funding: This work has been supported by The National Natural Science Foundation of China (No. 51378497).


Citation Information: International Journal of Nonlinear Sciences and Numerical Simulation, Volume 16, Issue 3-4, Pages 165–171, ISSN (Online) 2191-0294, ISSN (Print) 1565-1339, DOI: https://doi.org/10.1515/ijnsns-2014-0039.

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