Comparison of the dynamic behaviour of brain tissue and two model materials.

Author(s)
Brands, D.W.A. Bovendeerd, P.H.M. Peters, G.W.M. Wismans, J.S.H.M. & Paas, M.H.J.W. & Bree, J.K.M.J. van
Year
Abstract

Linear viscoelastic material parameters of porcine brain tissue and two brain substitute materials for use in mechanical head models (edible bone gelatin and dielectric silicone gel) were determined in small deformation, oscillatory shear experiments. Frequencies to 1000 Hertz could be obtained using the Time/Temperature Superposition principle. Brain tissue material parameters (dynamic modulus (phase angle) of 500 (10 degrees) and 1250 Pa (27 degrees) at 0.1 and 260 Hz respectively) are within the range of data reported in literature. The gelatin behaves much stiffer (modulus on the order of 100 kPa), and does not show viscous behaviour. Silicone gel resembles brain tissue at low frequencies but becomes more stiffer and more viscous at higher frequencies (dynamic modulus (phase angle) 245 Pa (7 degrees) and 5100 Pa (56 degrees) at 0.1 and 260 Hz respectively). The silicone gel behaves linearly for strains up to at least 10%, whereas brain tissue exhibits non-linear behaviour for strains larger than 1%. (A)

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Publication

Library number
C 16039 (In: C 16018 S [electronic version only]) /84 / ITRD E203583
Source

In: Proceedings of the 43th Stapp Car Crash conference, San Diego, California, USA, October 25-27, 1999, SAE Technical Paper 99SC21, p. 313-320, 17 ref.

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