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A new technique for combined dynamic compression-shear test

  • P. D. Zhao
  • F. Y. Lu
  • R. Chen
  • G. L. Sun
  • Y. L. Lin
  • J. L. Li
  • L. Lu
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

We propose a dynamic combined compressive and shear experimental technique at high strain rates (102-104 s-1). The main apparatus is mainly composed of a projectile, an incident bar and two transmitter bars. The close-to-specimen end of the incident is wedge-shaped with 90 degree. In each experiment, there are two identical specimens respectively agglutinated between one side of the wedge and one of transmitter bars. When a loading impulse travels to specimens along the incident bar, because of the special geometrical shape, the interface of specimen glued with the incident bar has an axial and a transverse velocity. Thus, the specimens endure the combined pressure-shear loading at high strain rates. The compression stress and strain are obtained by strain gages located on the bars; the shear stress is measured by two piezoelectric crystals of quartz with special cut direction embedded at the end (near specimen) of transmitter bars; the shear strain is measured with a novel optical technique which is based on the luminous flux method. The feasibility of this methodology is demonstrated with the SHPSB experiments on a polymer bonded explosive (PBX). Square-shaped specimen is adopted. Experimental results show that the specimen is obviously rate-dependent. Shear and compression failure occur for the specimen.

Keywords

Shear Strain High Strain Rate Transverse Velocity Shear Strain Rate Compression Failure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • P. D. Zhao
    • 1
  • F. Y. Lu
    • 1
  • R. Chen
    • 1
  • G. L. Sun
    • 2
    • 3
  • Y. L. Lin
    • 1
  • J. L. Li
    • 1
  • L. Lu
    • 4
  1. 1.College of ScienceNational Univ. of Defense TechnologyChangshaChina
  2. 2.College of Optoelectronics Science and EngineeringNational Univ. of Defense TechnologyChangshaChina
  3. 3.Institute of systems and mathematicsNaval Aeronautical Engineering InstituteYantaiChina
  4. 4.College of electronic science and engineeringNational Univ. of Defense TechnologyChangshaChina

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