TY - GEN
T1 - Shock wave propagation as a mechanism of injury in nonlinear viscoelastic soft tissues
AU - Laksari, Kaveh
AU - Shafieian, Mehdi
AU - Darvish, Kurosh
AU - Sadeghipour, Keyanoush
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
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U2 - 10.1115/imece2011-64717
DO - 10.1115/imece2011-64717
M3 - Conference contribution
SN - 9780791854884
T3 - ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
SP - 95
EP - 103
BT - Biomedical and Biotechnology Engineering; Nanoengineering for Medicine and Biology
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011
Y2 - 11 November 2011 through 17 November 2011
ER -