Research on Dynamic Fracture Behavior of Polymer Bonded Explosive Simulant Based on Cohesive Crack Model

Yun Xiao Cui, Peng Wan Chen*, Bao Qiao Guo, David A. Cendón, Zhong Bin Zhou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The dynamic tensile fracture behavior of polymer bonded explosive simulant was investigated. The experimental test was performed on notched semi-circular bending (NSCB) samples of the material by using the split Hopkinson pressure bar(SHPB) apparatus. With the aide of a high-speed camera, the dynamic displacement and strain field during the dynamic fracture process were obtained by the digital image correlation (DIC) technique. Based on cohesive crack model (CCM), the numerical simulation of the same conditions was performed. Compared with the results obtained by simulation and experiment, the good agreement was found for the time history of tensile stress and the displacement and strain fields during dynamic fracture. The behavior of crack propagation of PBX during NSCB test was analyzed by the CCM. Furthermore, the width of crack in NSCB sample is about 15% smaller than the experimental results.

Original languageEnglish
Pages (from-to)2379-2385
Number of pages7
JournalBinggong Xuebao/Acta Armamentarii
Volume38
Issue number12
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • Cohesive crack model
  • Dynamic NSCB experiment
  • Explosion mechanics
  • Polymer bonded explosive
  • Technique of digital image correlation

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