Anisotropic constitutive equations and experimental tensile behavior of brain tissue |
| |
Authors: | F Velardi F Fraternali M Angelillo |
| |
Institution: | (1) Section of Pediatric Neurosurgery, Institute of Neurosurgery, Catholic University Medical Centre, Largo A. Gemelli 1, 00168 Rome, Italy;(2) Pediatric Research Hospital “Bambino Gesù”, Piazza S. Onofrio 2, 00165 Rome, Italy;(3) Department of Civil Engineering, University of Salerno, 84084 Fisciano, SA, Italy |
| |
Abstract: | The present study deals with the experimental analysis and mechanical modeling of tensile behavior of brain soft tissue. A
transversely isotropic hyperelastic model recently proposed by Meaney (2003) is adopted and mathematically studied under uniaxial loading conditions. Material parameter estimates are obtained through
tensile tests on porcine brain materials accounting for regional and directional differences. Attention is focused on the
short-term response. An extrapolation of tensile test data to the compression range is performed theoretically, to study the
effect of the heterogeneity in the tensile/compressive response on the material parameters. Experimental and numerical results
highlight the sensitivity of the adopted model to the test direction. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|