Repository logo
  • Log In
    New user? Click here to register.Have you forgotten your password?
University College Dublin
  • Colleges & Schools
  • Statistics
  • All of DSpace
  • Log In
    New user? Click here to register.Have you forgotten your password?
  1. Home
  2. College of Engineering & Architecture
  3. School of Mechanical and Materials Engineering
  4. Mechanical & Materials Engineering Research Collection
  5. Experimental Characterisation of Neural Tissue at Collision Speeds
 
  • Details
Options

Experimental Characterisation of Neural Tissue at Collision Speeds

File(s)
FileDescriptionSizeFormat
Download IRCOBI_49_Rashid.pdf924.14 KB
Author(s)
Rashid, Badar 
Destrade, Michel 
Gilchrist, M. D. 
Uri
http://hdl.handle.net/10197/4770
Date Issued
2012
Date Available
17T07:31:31Z October 2013
Abstract
Mechanical characterization of brain tissue at high loading velocities is particularly important for modelling Traumatic Brain Injury (TBI). During severe impact conditions, brain tissue experiences a mixture of compression, tension and shear. Diffuse axonal injury (DAI) occurs in animals and humans when both the strains and strain rates exceed 10% and 10/s, respectively. Knowing the mechanical properties of brain tissue at these strains and strain rates is of particular importance, as they can be used in finite element simulations to predict the occurrence of brain injuries under different impact conditions. In this research, we describe the design and operation of a High Rate Tension Device (HRTD) that has been used for tensile tests on freshly harvested specimens of porcine neural tissue at speeds corresponding to a maximum strain rate of 90/s. We investigate the effects of inhomogeneous deformation of the tissue during tension by quasi‐static tests (strain rate 0.01/s) and dynamic tests (strain rate 90/s) using different thickness specimens (4.0, 7.0, 10.0 and 13.0 mm) of the same diameter (15.0 mm). Based on a combined experimental and computational analysis, brain specimens of aspect ratio (diameter/thickness) S = 10/10 or lower (10/12, 10/13) are considered suitable for minimizing the effects of inhomogeneous deformation during tension tests. The Ogden material parameters were derived from the experimental data both at quasi‐static conditions (µ = 440 Pa and α = ‐4.8 at 0.01/s strain rate) and dynamic conditions (µ = 4238 Pa and α = 2.8 at 90/s strain rate) by performing an inverse finite element analysis to model all experimental data. These material parameters will prove useful for the nonlinear hyperelastic analysis of brain tissue.
Type of Material
Conference Publication
Publisher
International Research Council on the Biomechanics of Injury
Copyright (Published Version)
2012 International Research Council on the Biomechanics of Injury
Keywords
  • Neural tissue

  • Brain tissue

  • Dynamic

  • Inhomogeneous

  • Traumatic Brain Injur...

Web versions
http://www.ircobi.org/downloads/irc12/pdf_files/49.pdf
Language
English
Status of Item
Peer reviewed
Part of
2012 IRCOBI Conference Proceedings 12 - 14 September 2012 - Dublin (Ireland) : IRC-12-49
Description
IRCOBI Conference 2012, 12 - 14 September 2012, Dublin (Ireland)
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Owning collection
Mechanical & Materials Engineering Research Collection
Views
1229
Last Week
1
Last Month
21
Acquisition Date
Jan 28, 2023
View Details
Downloads
180
Last Month
113
Acquisition Date
Jan 28, 2023
View Details
google-scholar
University College Dublin Research Repository UCD
The Library, University College Dublin, Belfield, Dublin 4
Phone: +353 (0)1 716 7583
Fax: +353 (0)1 283 7667
Email: mailto:research.repository@ucd.ie
Guide: http://libguides.ucd.ie/rru

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science

  • Cookie settings
  • Privacy policy
  • End User Agreement