Numerical Simulation of Double Specimens in Split Hopkinson Pressure Bar Testing

Muhammad Kariem, John Beynon, Dong Ruan

Research output: Contribution to conferencePaperpeer-review

Abstract

The split Hopkinson pressure bar (SHPB) is the most commonly used technique to characterize the dynamic behaviour of materials at very high strain rates. However, a classic single specimen test only generates a single stress-strain curve at the average strain rate of the test. This paper proposes three arrangements on the use of double specimens in SHPB compression testing. All waves propagating along the bars have been used to analyse the dynamic behaviour of the specimens. To simulate the test and predict its dynamic performance, an axisymmetric finite element analysis using LS-DYNA was conducted for the experiment using 13 mm bar diameter. The validity of the simulations was checked with experimental data from normal SHPB testing. Based on the simulations, the modified techniques are achievable and at least two stress-strain curves of materials can be extracted without violating the requirement of a valid SHPB test.

Original languageEnglish
Pages2483-2486
Number of pages4
DOIs
Publication statusPublished - 17 Aug 2010
Event7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7 -
Duration: 2 Aug 2010 → …

Conference

Conference7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
Period2/08/10 → …

Keywords

  • Double specimens
  • Finite element model
  • LS-DYNA
  • SHPB (kolsky bar)

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