Shock wave propagation as a mechanism of injury in nonlinear viscoelastic soft tissues

Kaveh Laksari, Mehdi Shafieian, Kurosh Darvish, Keyanoush Sadeghipour

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

Abstract

This study investigates the propagation of shock waves and self-preserving waves in soft tissues such as brain as a mechanism of injury in high rate loading conditions as seen in blastinduced neurotrauma (BINT). The derived mathematical models indicate that whereas linear viscoelastic models predict only decaying waves, instances of such phenomena as shock can be achieved in nonlinear media. In this study, a nonlinear viscoelastic material model for brain tissue was developed in compression. Furthermore, nonlinear viscoelastic wave propagation in brain tissue was studied and a criterion for the development of shock waves was formulated. It was shown that discontinuities in the acceleration that happen in blast loading conditions may evolve to shock waves, resulting in large discontinuities in strain and stress at the wave front leading to tissue injuries. Copyright c 2011 by ASME.

Original languageEnglish (US)
Title of host publicationASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Pages95-103
Number of pages9
Publication statusPublished - Dec 1 2011
Externally publishedYes
EventASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 - Denver, CO, United States
Duration: Nov 11 2011Nov 17 2011

Publication series

NameASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Volume2

Other

OtherASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
CountryUnited States
CityDenver, CO
Period11/11/1111/17/11

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ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Laksari, K., Shafieian, M., Darvish, K., & Sadeghipour, K. (2011). Shock wave propagation as a mechanism of injury in nonlinear viscoelastic soft tissues. In ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 (pp. 95-103). (ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011; Vol. 2).