Modeling light-controlled actuation of flexible magnetic composite structures using the finite element method (FEM)

Amit Kumar Jha, Meng Li, Ewan S. Douglas, Erin R. Maier, Fiorenzo G. Omenetto, Corey Fucetola

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Photoactive materials hold great promise for a variety of applications. We present a finite element model of light-controlled flexible magnetic composite structure composed of 33.3% Chromium dioxide (CrO2) and 66.7% Polydimethylsiloxane (PDMS) by weight. The structure has a dimension of 8 mm × 2 mm × 100 μm and has been previously experimentally studied. Due to the low Curie temperature, the structure acts as an actuator, shows significant deflection under the external magnetic field and relaxation due to laser heating. Thermal and magnetic deflection analysis has been performed using the FEM model. The simulation results show a maximum structural deflection of 6.08 mm (76% of the length of the structure) when subjected to 30 mT magnetic flux density and 160 mW laser power at 303 K (room temperature). We will present the results of the simulation model and comparison to experimental data reproducing the previously observed motion of the (CrO2+PDMS). This model will enable future fracture and fatigue analysis as well as extension to new photoactive geometries.

Original languageEnglish (US)
Title of host publicationMolecular and Nano Machines III
EditorsZouheir Sekkat, Takashige Omatsu
ISBN (Electronic)9781510637603
StatePublished - 2020
EventMolecular and Nano Machines III 2020 - Virtual, Online, United States
Duration: Aug 24 2020Sep 4 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceMolecular and Nano Machines III 2020
Country/TerritoryUnited States
CityVirtual, Online


  • FEM
  • Light actuation
  • PDMS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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