DYNAMIC RESPONSE and FIRST PASSAGE of SMA TRACHEAL STENT in COUGH PROCESS

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

2 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Article number2040019
Journal / PublicationJournal of Mechanics in Medicine and Biology
Volume20
Issue number9
Online published16 Sept 2020
Publication statusPublished - Nov 2020
Externally publishedYes

Link(s)

Abstract

The high-order nonlinear terms are applied to express the strain-stress curves of shape memory alloy (SMA) materials, and a new type of SMA model is proposed. Cough process is regarded as a strong stochastic process, and the mechanical model of an SMA tracheal stent in cough process is proposed where the large deformation caused by cough is considered. The system's natural frequency is obtained, and its dynamic response is analyzed. The analysis and simulation results show that when the intensity of outside excitation increased 3.5 times (from 0.2 to 0.7), the system's first-passage time was advanced by 19%, which means that the increase of the cough intensity will cause the loss of the stent; the large-amplitude vibration can be eliminated by selecting materials with appropriate parameters, which means the loss of tracheal stent can be avoided even in strong cough. This paper provides a new way to avoid the stent's loss. © 2020 The Author(s).

Research Area(s)

  • cough, Shape memory alloy, strong nonlinearity, tracheal stent

Download Statistics

No data available