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Hysteresis modeling of porous SMA for drug delivery system designed and fabricated by the laser-assisted sintering

Published online by Cambridge University Press:  28 June 2013

Igor V. Shishkovsky
Igor V. Shishkovsky*
Affiliation:
P.N. Lebedev Physics Institute of Russian Academy of Sciences, Samara branch, Novo-Sadovaja st. 221, Samara 443011, [email protected]
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Abstract

In this report we develop a complete mathematical model for a porous scaffold from nitinol (NiTi – intermetallic phase) with a shape memory effect (SME), fabricated layerwise via the selective laser sintering (SLS) process. The operation of the SME bio-fluidic MEMS involves such physical process as a heat transfer, a phase transformation with a temperature hysteresis, stress-strain and electrical resistance variations accompanied the phase transformation. The simulations were conducted for the electro- and a thermo- mechanical hysteresis phenomenon, during the SME in the porous nitinol structures of the cylinder shape, which allow to formulate a recommendations for SLS. Previously done the temperature evolution of electrical resistivity was compared with our present calculations as a function of the laser-processing parameters for three dimensional nitinol samples. This model can be used for an estimation of a drug delivery system route during a porous phase volume changing.

Keywords

microelectro-mechanical (MEMS)biomaterialfluidics
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1569: Symposium NN – Advanced Materials for Biological and Biomedical Applications , 2013 , pp. 141 - 147
Copyright
Copyright © Materials Research Society 2013 

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References

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