The non-linear mechanical behaviour of porcine brain tissue in different deformation modes is determined.An improved method for rotational shear experiments is used, producing an approximatelyhomogeneous strain field and leading to an enhanced accuracy. Results from oscillatory experiments,stress relaxation experiments and constant strain rate experiments are presented. Large deformations atthe time scale of loading and the material behaviour during complex loading paths (loading-unloading)is investigated. No significant immediate mechanical damage is observed for these shear deformations.A new differential viscoelastic model is used to describe the non-linear mechanical response of braintissue. This constitutive model is readily applicable in three-dimensional head models in order to predictthe mechanical response of the intra-cranial contents due to an impact.
|Title of host publication||Proceedings 2005 IRCOBI International Conference of the Biomechanics of Impact, 21-23 september 2005, Prague,Czech Republic|
|Place of Publication||Czech Republic, Prague|
|Publisher||International Research Council on the Biomechanics of Impact|
|ISBN (Print)||782951421066, 2951421060|
|Publication status||Published - 2005|
|Event||2005 International IRCOBI conference on the Biomechanics od Impact, September 21-23, 2005, Prague (Czech Republic - Prague, Czech Republic|
Duration: 21 Sep 2005 → 23 Sep 2005
|Conference||2005 International IRCOBI conference on the Biomechanics od Impact, September 21-23, 2005, Prague (Czech Republic|
|Abbreviated title||IRCOBI 2005|
|Period||21/09/05 → 23/09/05|
Hrapko, M., Dommelen, van, J. A. W., Peters, G. W. M., & Wismans, J. S. H. M. (2005). The mechanical behaviour of brain tissue: large strain respones and constitutive modelling. In Proceedings 2005 IRCOBI International Conference of the Biomechanics of Impact, 21-23 september 2005, Prague,Czech Republic (pp. 59-69). Czech Republic, Prague: International Research Council on the Biomechanics of Impact.