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. Extreme softness of brain matter in simple shear
 
  • Details
Options

Extreme softness of brain matter in simple shear

Author(s)
Destrade, Michel  
Gilchrist, M. D.  
Murphy, Jeremiah G.  
Rashid, Badar  
Saccomandi, Giuseppe  
Uri
http://hdl.handle.net/10197/7879
Date Issued
2015-10
Date Available
2017-10-01T01:00:23Z
Abstract
We show that porcine brain matter can be modelled accurately as a very soft rubber-like material using the Mooney–Rivlin strain energy function, up to strains as high as 60%. This result followed from simple shear experiments performed on small rectangular fresh samples (2.5 cm3 and 1.1 cm3) at quasi-static strain rates. They revealed a linear shear stress–shear strain relationship (R2>0.97), characteristic of Mooney–Rivlin materials at large strains. We found that porcine brain matter is about 30 times less resistant to shear forces than a silicone gel. We also verified experimentally that brain matter exhibits the positive Poynting effect of non-linear elasticity, and numerically that the stress and strain fields remain mostly homogeneous throughout the thickness of the samples in simple shear.
Sponsorship
Irish Research Council
Type of Material
Journal Article
Publisher
Elsevier
Journal
International Journal of Non-Linear Mechanics
Volume
75
Start Page
54
End Page
58
Copyright (Published Version)
2015 Elsevier
Subjects

Mechanics of brain ma...

Simple shear

Constitutive modellin...

Experimental testing

Simulations

Poynting effect

DOI
10.1016/j.ijnonlinmec.2015.02.014
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
File(s)
Loading...
Thumbnail Image
Name

Gilchrist_132_Archival_Repository.pdf

Size

4.75 MB

Format

Adobe PDF

Checksum (MD5)

04bba154d7918e9015c24a548d7cf675

Owning collection
Mechanical & Materials Engineering Research Collection

Item descriptive metadata is released under a CC-0 (public domain) license: https://creativecommons.org/public-domain/cc0/.
All other content is subject to copyright.

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

  • Cookie settings
  • Privacy policy
  • End User Agreement