Type

Journal Article

Authors

Michael Gilchrist
Michel Destrade
Badar Rashid

Subjects

Engineering

Topics
elastic ogden shear traumatic brain injury tbi finite element analysis compression traumatic brain injury tbi hyperelastic

Inhomogeneous deformation of brain tissue during tension tests (2012)

Abstract Mechanical characterization of brain tissue has been investigated extensively by various research groups over the past 50 years. These properties are particularly important for modeling Traumatic Brain Injury (TBI). In this research, we present the design and calibration of a High Rate Tension Device (HRTD) capable of performing tests up to a maximum strain rate of 90/s. We use experimental and numerical methods to investigate the effects of inhomogeneous deformation of porcine brain tissue during tension at different specimen thicknesses (4.0 14.0 mm), by performing tension tests at a strain rate of 30/s. One-term Ogden material parameters (μ = 4395.0 Pa, α = −2.8) were derived by performing an inverse finite element analysis to model all experimental data. A similar procedure was adopted to determine Young s modulus (E = 11200 Pa) of the linear elastic regime. Based on this analysis, brain specimens of aspect ratio (diameter/thickness) S /1.0 are required to minimise the effects of inhomogeneous deformation during tension tests.
Collections Ireland -> National University of Ireland Galway -> Mathematics
Ireland -> National University of Ireland Galway -> School of Mathematics, Statistics and Applied Mathematics
Ireland -> University College Dublin -> Mechanical & Materials Engineering Research Collection
Ireland -> National University of Ireland Galway -> Mathematics (Scholarly Articles)
Ireland -> National University of Ireland Galway -> College of Science
Ireland -> University College Dublin -> College of Engineering & Architecture
Ireland -> University College Dublin -> School of Mechanical and Materials Engineering

Full list of authors on original publication

Michael Gilchrist, Michel Destrade, Badar Rashid

Experts in our system

1
M. D. Gilchrist
University College Dublin
Total Publications: 172
 
2
Michel Destrade
National University of Ireland Galway
Total Publications: 106
 
3
Badar Rashid
University College Dublin
Total Publications: 16