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SUMMARY:Anomalous toughness of elastic micro-architected solids - Prof. Vi
 kram Deshpande
DTSTART:20230309T150000Z
DTEND:20230309T160000Z
UID:TALK196951@talks.cam.ac.uk
CONTACT:Julie Smith
DESCRIPTION:Rapid progress in additive manufacturing methods has led to th
 e creation of a new class of architected metamaterials that comprise of a 
 network of struts resembling a periodic truss structure. The mechanical pe
 rformance these materials is ultimately limited by their tolerance to dama
 ge and defects. Yet\, manufacturing limitations has meant that experimenta
 l investigations of the toughness of these materials have remained elusive
 . Using architected material specimens comprising 10s of millions of unit-
 cells we show that not only is stress intensity factor\, as used in conven
 tional elastic fracture mechanics\, insufficient to characterise fracture 
 in these architected materials but also that conventional fracture testing
  protocols are inadequate. Via a combination of numerical calculations and
  asymptotic analyses we extend the ideas of fracture mechanics to architec
 ted materials and thereby develop a design and test protocol for their str
 uctural failure. 
LOCATION:Goldsmiths 2 &amp\; https://us06web.zoom.us/j/81688365420?pwd=b3R
 pdHgxNVhWbWQrbXluMUxYNWVtQT09 Meeting ID: 816 8836 5420 Passcode: 047859
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