%0 Journal Article %1 ElSayed2008a %A Sayed, Tamer El %A Mota, Alejandro %A Fraternali, Fernando %A Ortiz, Michael %D 2008 %J Journal of Biomechanics %K Biological Cavitation, Finite Genetic Hyper Microinertia Ogden, Plasticity, Shear, Variational, Viscosity, Volumetric algorithms, damage, elasticity, strain, tissues, %N 7 %P 1458--1466 %T A variational constitutive model for soft biological tissues %U http://www.sciencedirect.com/science/article/B6T82-4S9FH83-2/2/3095b4d4329fa9a8f5d5437fd7b31f34 %V 41 %X In this paper, a fully variational constitutive model of soft biological tissues is formulated in the finite strain regime. The model includes Ogden-type hyperelasticity, finite viscosity, deviatoric and volumetric plasticity, rate and microinertia effects. Variational updates are obtained via time discretization and pre-minimization of a suitable objective function with respect to internal variables. Genetic algorithms are used for model parameter identification due to their suitability for non-convex, high dimensional optimization problems. The material behavior predicted by the model is compared to available tests on swine and human brain tissue. The ability of the model to predict a wide range of experimentally observed behavior, including hysteresis, cyclic softening, rate effects, and plastic deformation is demonstrated.

@article{ElSayed2008a, abstract = {In this paper, a fully variational constitutive model of soft biological tissues is formulated in the finite strain regime. The model includes Ogden-type hyperelasticity, finite viscosity, deviatoric and volumetric plasticity, rate and microinertia effects. Variational updates are obtained via time discretization and pre-minimization of a suitable objective function with respect to internal variables. Genetic algorithms are used for model parameter identification due to their suitability for non-convex, high dimensional optimization problems. The material behavior predicted by the model is compared to available tests on swine and human brain tissue. The ability of the model to predict a wide range of experimentally observed behavior, including hysteresis, cyclic softening, rate effects, and plastic deformation is demonstrated.}, added-at = {2009-08-01T18:41:40.000+0200}, author = {Sayed, Tamer El and Mota, Alejandro and Fraternali, Fernando and Ortiz, Michael}, biburl = {https://www.bibsonomy.org/bibtex/23cae768c0c56c75233ba3027f3437c74/jaksonmv}, file = {:D\:\\Users\\Jaksonmv\\Documents\\papers\\Sayed2008a.pdf:PDF}, interhash = {cff56c47bc0666c2e15726d70af15ca2}, intrahash = {3cae768c0c56c75233ba3027f3437c74}, issn = {0021-9290}, journal = {Journal of Biomechanics}, keywords = {Biological Cavitation, Finite Genetic Hyper Microinertia Ogden, Plasticity, Shear, Variational, Viscosity, Volumetric algorithms, damage, elasticity, strain, tissues,}, number = 7, owner = {Jaksonmv}, pages = {1458--1466}, timestamp = {2009-08-01T18:41:43.000+0200}, title = {A variational constitutive model for soft biological tissues}, url = {http://www.sciencedirect.com/science/article/B6T82-4S9FH83-2/2/3095b4d4329fa9a8f5d5437fd7b31f34}, volume = 41, year = 2008 }