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SUMMARY:Flexural Mechanics of Creases in Thin Metallic Strips - Martin Wal
 ker - Structures Group
DTSTART:20161014T140000Z
DTEND:20161014T143000Z
UID:TALK68493@talks.cam.ac.uk
CONTACT:Lorna Everett
DESCRIPTION:The presence of mechanically formed corrugations in thin metal
 lic shells has been shown to have a dramatic effect on mechanical behaviou
 r\, such as creating orthotropy in isotropic shells. This offers the poten
 tial to tailor the mechanics of shell structures for a particular applicat
 ion\, thereby increasing efficiency. For analysis purposes\, it is common 
 to treat the crease line as a singular rotational hinge\, often combined w
 ith a torsional spring to provide elastic resistance to opening. We examin
 e this assumption for creases in thin metallic strips by endowing the crea
 se with a finite\, but small\, geometry and approaching the singular limit
 . We show that when the crease dimensions are on the order of the shell th
 ickness\, stretching along the crease line must occur. A simple model is d
 eveloped incorporating this stretching\, which allows a good prediction of
  experimentally observed flexural behaviour.
LOCATION: Cambridge University Engineering Department\, LR6
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