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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Level-set topology optimization for robust design 
 of structures under internal porosity constraints 
 - Jesus Martinez-Frutos (Universidad Politécnica d
 e Cartagena)
DTSTART;TZID=Europe/London:20190612T100000
DTEND;TZID=Europe/London:20190612T110000
UID:TALK125863AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/125863
DESCRIPTION:Porosity is a well-known phenomenon occurring duri
 ng various manufacturing processes (casting\, weld
 ing\, additive manufacturing) of solid structures\
 , which undermines their reliability and mechanica
 l performance.  The main purpose of this talk is t
 o introduce a new constraint functional of the dom
 ain which controls the negative impact of porosity
  on elastic structures in the framework of shape a
 nd topology optimization. The main ingredient of o
 ur modeling is the notion of topological derivativ
 e\, which is used in a slightly unusual way: inste
 ad of being an indicator of where to nucleate hole
 s in the course of the optimization process\, it i
 s a component of a new constraint functional which
  assesses the influence of pores on the mechanical
  performance of structures. The shape derivative o
 f this constraint is calculated and incorporated i
 nto a level set based shape optimization algorithm
 . This approach will be illustrated by several two
 - and three-dimensional numerical experiments of t
 opology optimization problems constrained by a con
 trol on the porosity effect. These works have been
  conducted together with Gr&eacute\;goire Allaire\
 , Charles Dapogny and Francisco Periago.
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:INI IT
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