Computational Modeling and Experimental Characterization of Hyperelastic Thin Film NiTi for Neurovascular Microstent Applications

A novel hyperelastic thin film NiTi covered neurovascular microstent was developed for treating wide-neck and fusiform neurovascular aneurysms. This device requires 300–500% recoverable elongation for both collapsing and deployment. Nonlinear buckling and static analysis of Finite Element Modeling (FEM: ANSYS software used) was applied for obtaining critical buckling stress and critical strain values depending on thickness, strut width and pore height. A maximum theoretical critical strain for one geometry as high as 316% while a different experimentally tested film was found to strain 600% elastically without any signs of permanent deformation.

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Characterization of Large Thin Film Membrane Dynamic Behavior with UAI-NASTRAN Finite Element Solver

10.4271/1999-01-5518 ◽

1999 ◽

Cited By ~ 2

Author(s):

Sebastien Lienar

Keyword(s):

Thin Film ◽

Finite Element ◽

Dynamic Behavior ◽

Membrane Dynamic ◽

Thin Film Membrane

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Experimental characterization of magnetic anisotropy and intergranular interaction for thin film media

Advanced Materials '93 ◽

10.1016/b978-1-4832-8380-7.50183-8 ◽

1994 ◽

pp. 777-782 ◽

Cited By ~ 1

Author(s):

T. Shimatsu ◽

M. Takahashi ◽

M. Suekane ◽

M. Miyamura ◽

K. Yamaguchi ◽

...

Keyword(s):

Thin Film ◽

Magnetic Anisotropy ◽

Experimental Characterization

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FORCE CHARACTERIZATION OF A TUBULAR LINEAR ELECTROMAGNETIC ACTUATOR USING FINITE ELEMENT ANALYSIS METHOD (FEM)

Jurnal Teknologi ◽

10.11113/jt.v78.9901 ◽

2016 ◽

Vol 78 (11) ◽

Author(s):

Mariam Md Ghazaly ◽

Tawfik Ahmed Yahya ◽

Aliza Che Amran ◽

Zulkeflee Abdullah ◽

Mohd Amran Md Ali ◽

...

Keyword(s):

Finite Element ◽

Ansys Software ◽

Element Analysis ◽

Electromagnetic Actuators ◽

Halbach Array ◽

Output Characteristics ◽

Actuator Design ◽

Force Displacement ◽

The Magnetic Field

This paper presents an extensive characterising study of two novel electromagnetic actuators, each with different constructions and characteristics aiming to analyse the behaviour and output characteristics of the two designs. The two actuators are Tubular Linear Reluctance Actuator (TLRA) and Tubular Linear Permanent magnet (TLPM) with Halbach array actuator. The study covered the variation of three parameters, which are the actuator air gap, number of turns and actuator size. A comparative section was also presented for the purpose of comparison. The study concentrated extensively on the two characteristics of both actuators known as output thrust force and working range as they are considered as two main concerns of any actuator design. The simulation was used to show the differences between the two designs in many design aspects such as force, displacement and effects of parameters variations. The applied simulation was performed using 3D Finite-element Ansys software, which is capable of showing the magnetic field distribution in the whole actuator and predicting the strength and length of the output stroke.

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