Abstract
Human spine ligaments show a highly non-linear, strain rate dependent biomechanical behavior under tensile tests. A visco-hyperelastic fiber-reinforced constitutive model was accordingly developed for human ligaments, in which the energy density function is decomposed into two parts. The first part represents the elastic strain energy stored in the soft tissue, and the second part denotes the energy dissipated due to its inherent viscous characteristics. The model is applied to various human spinal ligaments including the anterior and posterior longitudinal ligaments, ligamentum flavum, capsular ligament, and interspinous ligament. Material parameters for each type of ligament were obtained by curve-fitting with corresponding experimental data available in the literature. The results indicate that the model presented here can properly characterize the visco-hyperelastic biomechanical behavior of human spine ligaments.
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The authors would like to acknowledge the support of the National Natural Science Foundation of China (50975236, 11172171) and Key Scientific and Technological Project Foundation of Chongqing, China (CSTC2012gg-yyjs10011).
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Jiang, Y., Wang, Y. & Peng, X. A Visco-Hyperelastic Constitutive Model for Human Spine Ligaments. Cell Biochem Biophys 71, 1147–1156 (2015). https://doi.org/10.1007/s12013-014-0322-9
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DOI: https://doi.org/10.1007/s12013-014-0322-9