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Testing of Body Armor Materials Phase III (2012) / Chapter Skim
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Appendix E Ballistic Body Armor Insert Composition and Defeat Mechanisms
Pages 272-273

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From page 272...
... Hence, they are used in combination with other materials such as polymers and metals as laminar composites, which enhances their excellent protection properties. A hard body armor plate typically includes a layer of dense boron carbide or silicon carbide backed by a layer of metal, polymer, or a composite.
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From page 273...
... In addition to a plastic zone, a cone crack develops at the point of contact and propagates into the solid and eventually completely through the ceramic plate. The highly fractured zone of ceramic material, which generates from the rear surface of the ceramic plate, forms primarily within the boundary of the cone crack.
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Key Terms

  • cone crack
  • backup plate
  • ceramic plate
  • body armor
  • crushed ceramic

  • impact event
  • plastic deformation
  • plastic zone
  • suppress macroscopic
  • rear surface

  • ceramic armor
  • macroscopic fracture
  • armor plate
  • material flows
  • material tend

  • permit plastic
  • compressive stress
  • develops beneath
  • person wearing
  • kinetic energy

  • plate depends
  • highly fractured
  • excellent performance
  • favorable scenario
  • boron carbide

  • armor package
  • low density
  • package defeats
  • ceramic cone
  • fatal threat


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