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Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron
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Sacrificial Cladding with Brittle Materials for Blast Protection.

Ludovic Blanc1, Thérèse Schunck1, Dominique Eckenfels1

  • 1French-German Research Institute of Saint-Louis, 5 Rue du Général Cassagnou, CEDEX, 68300 Saint-Louis, France.

Materials (Basel, Switzerland)
|July 24, 2021
PubMed
Summary

Granular media and concrete foam efficiently absorb blast energy. Granular media acts as a crushable core even under low loads, differing from traditional materials.

Keywords:
blast protectionbrittle deformationexperimental worksacrificial cladding

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Solid Mechanics

Background:

  • Sacrificial claddings are used as crushable cores for blast load mitigation.
  • Concrete foam and granular media are investigated as potential core materials.
  • Understanding energy dissipation mechanisms in these materials is crucial for effective blast protection.

Purpose of the Study:

  • To investigate the blast performance of sacrificial claddings filled with concrete foam and granular media.
  • To compare the energy dissipation mechanisms of concrete foam and granular media under blast loading.
  • To analyze the crushing behavior of granular media as a core material.

Main Methods:

  • Experimental investigation using an explosive-driven shock tube.
  • Blast loading applied to sacrificial claddings filled with different brittle materials.
  • Load transmission measured by sensors and core compression recorded by high-speed cameras.
  • Granular media analyzed as a cellular material, computing plateau stress and densification strain using energy absorption efficiency.

Main Results:

  • Both concrete foam and granular media function as effective crushable cores.
  • Significant differences observed in energy dissipation mechanisms between concrete foam and granular media.
  • Granular media demonstrates a tendency to act as a core even under low-intensity blast loads.
  • Key parameters like plateau stress and densification strain were quantified for granular media.

Conclusions:

  • Granular media exhibits unique crushing behavior and energy absorption characteristics compared to concrete foam.
  • The findings enhance the understanding of granular media's performance in blast mitigation applications.
  • Granular media presents a viable alternative to traditional crushable core materials, particularly for lower load scenarios.