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SUMMARY:‘Light-weight impact and blast resistant materials’ - Dr Graha
 m McShane
DTSTART:20111111T150000Z
DTEND:20111111T160000Z
UID:TALK34458@talks.cam.ac.uk
CONTACT:Lorna Everett
DESCRIPTION:Improving the resistance of materials to dynamic loads such as
  impact and blast\, but without adding excessive weight\, poses a challeng
 e for a number of military and civilian structural applications.  The firs
 t part of the talk will discuss the combination of metals and polymers in 
 laminated composites in order to increase resistance to impact perforation
  by rigid indenters.  The influence of the polymer and metal properties\, 
 projectile geometry\, layer thicknesses and layer arrangement will be disc
 ussed.  It is found that a polymer coating on the impacted face of a light
 -weight metallic plate can significantly enhance impact energy absorption\
 , with laminate configurations outperforming heavier metal plates.  The fi
 ndings may find application in light-weight impact damage tolerant constru
 ction materials or polymer retro-fit coatings for protecting existing stru
 ctures against impact perforation.  The second part of the talk will discu
 ss the addition of nano-scale fillers (such as carbon black\, or nano-clay
 ) to polymers in order to enhance resistance to impact loads.  The charact
 eristics of these polymer nano-composites will be assessed as the mode of 
 deformation and strain rate is altered.  The final part of the talk will a
 ddress materials for blast mitigation.  Sandwich structures with metallic 
 cellular cores show potential as light-weight\, blast resistant materials.
   During blast loading\, a large velocity can be imparted to the front fac
 e sheet\, resulting in the core undergoing high rates of compression.  Num
 erical results will be presented showing the regimes of dynamic compressiv
 e collapse of metallic lattice structures which might be used as sandwich 
 panel cores.  The influence of the collapse regime on the forces exerted o
 n the face sheets\, which is important for the blast resistance of a panel
 \, will be shown.\n\n
LOCATION:Engineering Department - **LR6**
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