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SUMMARY:Shear-flexible subdivision shells with non-manifold geometry - Dr 
 Burkhard Bornemann\, CUED
DTSTART:20120217T150000Z
DTEND:20120217T160000Z
UID:TALK36529@talks.cam.ac.uk
CONTACT:Lorna Everett
DESCRIPTION:Shells are structures occurring in many applications in nature
  and technology. Due to their inherent high ratio of stiffness over weight
  they can exhibit extraordinary structural behaviour. On the other hand th
 ey can be quite sensitive with respect to imperfections in geometry or ina
 ppropriate loadings. The computation of shell structures is therefore inte
 rested in finding suitable shell models and discretisation methods to desc
 ribe accurately the interplay of geometry\, kinematics and mechanics of sh
 ells. In the talk\, a geometrically non-linear shear-flexible shell formul
 ation is presented which can be used for thin and thick shells. The deform
 ed configuration of a shell is parameterised using the mid-surface positio
 n vector and an additional shear vector for describing the out- of-plane s
 hear deformations. The mid-surface has to be interpolated with C1-continuo
 us shape functions for which smooth subdivision shape functions are applie
 d. Subdivision shape functions allow also to relax continuity to enable no
 n-manifold geometries which arise in many engineering applications. The su
 bdivision shell formulation is used for optimising a plate with stiffeners
 .\n
LOCATION:Engineering Department - **LR6**
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