Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury

Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury

Bibliographic Details
Main Author: Sista, Sri Narasimha Bhargava
Language:English
Published: University of Cincinnati / OhioLINK 2011
Subjects:
Mechanical Engineering
viscohyperelastic
bovine brain tissue
high strain rates
traumatic brain injury (TBI)
soft tissue mechanics
rate dependent behavior
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321367633
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin13213676332021-08-03T06:15:05Z Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury Sista, Sri Narasimha Bhargava Mechanical Engineering viscohyperelastic bovine brain tissue high strain rates traumatic brain injury (TBI) soft tissue mechanics rate dependent behavior Understanding the mechanics of soft tissue injury is critical to mitigating traumatic brain injury (TBI) that may occur due to vehicular accidents, blasts and sports injuries. In particular, for the case of brain tissue, modeling the response at high compressive strain rates is needed to simulate TBI. In the current study, two visco-hyperelastic models are developed for brain tissue response at high strain rates using the continuum mechanics framework. One model uses an integral formulation to capture the large deformation (60%) and nonlinear viscoelastic rate-dependence and the other uses strain rate as an explicit variable to capture deformation upto 40% at high strain rates. These models are motivated by the experimental data available in the literature. These novel material models are able to accurately predict the mechanical behavior at very highstrain rates (upto 3000%/s), unlike other material models available in the literature which are restricted to very slow strain rates. The proposed models can be used for applications such as injury mechanics, where impact loads are predominant. 2011 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321367633 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321367633 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection NDLTD
language English
sources NDLTD
topic Mechanical Engineering
viscohyperelastic
bovine brain tissue
high strain rates
traumatic brain injury (TBI)
soft tissue mechanics
rate dependent behavior
spellingShingle Mechanical Engineering
viscohyperelastic
bovine brain tissue
high strain rates
traumatic brain injury (TBI)
soft tissue mechanics
rate dependent behavior
Sista, Sri Narasimha Bhargava
Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury
author Sista, Sri Narasimha Bhargava
author_facet Sista, Sri Narasimha Bhargava
author_sort Sista, Sri Narasimha Bhargava
title Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury
title_short Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury
title_full Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury
title_fullStr Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury
title_full_unstemmed Viscohyperelastic Constitutive Modeling of Bovine Brain Tissue at High Strain Rates to Simulate Traumatic Brain Injury
title_sort viscohyperelastic constitutive modeling of bovine brain tissue at high strain rates to simulate traumatic brain injury
publisher University of Cincinnati / OhioLINK
publishDate 2011
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321367633
work_keys_str_mv AT sistasrinarasimhabhargava viscohyperelasticconstitutivemodelingofbovinebraintissueathighstrainratestosimulatetraumaticbraininjury
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