Title
On the consequences of non linear constitutive modelling of brain tissue for injury prediction with numerical head models
Author
Hrapko, M.
van Dommelen, J.A.W.
Peters, G.W.M.
Wismans, J.S.H.M.
TNO Industrie en Techniek
Publication year
2009
Abstract
The objective of this work was to investigate the influences of constitutive non linearities of brain tissue in numerical head model simulations by comparing the performance of a recently developed non linear constitutive model [10, 11] with a simplified version, based on neo-Hookean elastic behaviour, and with a previously developed constitutive model [6]. Numerical simulation results from an existing 3D head model in the explicit Finite Element code MADYMO were compared. A head model containing a sliding interface between the brain and the skull was used and results were compared with the results obtained with a previously validated version possessing a tied skull-brain interface. For these head models, the effects of different constitutive models were systematically investigated for different loading directions and varying loading amplitudes in both translation and rotation. In the case of the simplified and fully non linear version of the model of Hrapko et al. [10, 11], the response predicted with a head model for varying conditions (i.e. severity and type of loading) varies consistently with the constitutive behaviour. Consequently, when used in a finite element head model, the response can be scaled according to the constitutive model used. However, the differences found when using the non linear model of Brands et al. [5] were dependent on the loading conditions. Hence this model is less suitable for use in a numerical head model.
Subject
Traffic
Brain tissue
Constitutive model
Finite element method
Mechanical properties
3D head model
Brain interfaces
Brain tissue
Constitutive behaviour
Constitutive modelling
Elastic behaviour
Explicit finite element codes
Finite Element
Head model
Injury prediction
Loading condition
Loading direction
Non-linear
Non-linear model
Non-Linearity
Nonlinear versions
Numerical simulation
Sliding interfaces
Biomechanics
Brain
Brain models
Computer simulation languages
Constitutive models
Mechanical properties
Simulators
Three dimensional
Finite element method
To reference this document use:
http://resolver.tudelft.nl/uuid:6ee2c9e4-b50e-44b5-adaf-4ba50b688a52
DOI
https://doi.org/10.1080/13588260802440290
TNO identifier
241585
ISSN
1358-8265
Source
International Journal of Crashworthiness, 14 (3), 245-257
Document type
article