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UID:event-35@tuemeche.nl
DTSTAMP:20261008T003011Z
DTSTART;TZID=Europe/Amsterdam:20260924T100000
DTEND;TZID=Europe/Amsterdam:20260924T110000
SUMMARY:Developing a self-bending kirigami structure driven by liquid cry
 stal elastomers
DESCRIPTION:Speaker: Loek Jansen (TU/e)\nHost: Lambèrt van Breemen\n\nLi
 quid crystal elastomers (LCEs) are promising smart materials capable of u
 ndergoing large anisotropic deformations in response to external stimuli.
  When exposed to heat\, the material's microstructure transitions from an
  ordered to an isotropic state\, resulting in shrinkage along the directo
 r and expansion in the perpendicular directions. Despite their potential\
 , the practical implementation of LCEs remains challenging due to the com
 plexity of predicting their mechanical behavior.\n\nThis research investi
 gates the design of thermally responsive LCE patches to induce controlled
  deformation in plastic kirigami structures. Kirigami\, a Japanese art fo
 rm\, involves cutting and folding a flat sheet into a three-dimensional s
 hape. The same principle can be applied to plastic foils containing embed
 ded electronics to create deployable or shape-morphing devices.\n\nThe st
 udy begins with the material characterization of both the LCE and the pol
 yethylene naphthalate (PEN) substrate. Based on the obtained material pro
 perties\, a finite element model of a kirigami structure consisting solel
 y of PEN is developed and validated against experimental results. The res
 ulting strain fields are subsequently used to determine the optimal place
 ment and director orientation of the LCE patches. These patches are then 
 incorporated into the numerical model to predict the resulting deformatio
 n and to provide insight into the required patch dimensions.\n\nThe propo
 sed design workflow enables the systematic determination of the placement
 \, size\, and director orientation of LCE patches on kirigami structures 
 and is validated through a physical prototype. Although the prototype exh
 ibited a lower-than-desired deformation\, the experimental results showed
  good agreement with the simulation predictions\, demonstrating the effec
 tiveness of the proposed design approach.
LOCATION:Vector 2.429
URL:https://tuemeche.nl/peoplepages/event.php?id=35
CATEGORIES:MSc Thesis Defense
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