Connective soft tissues have a pronounced anisotropic mechanical behavior due to their internal structure, consisting of a quasi isotropic ground substance and anisotropic reinforcement based mostly in elastin and collagen fibers. The objective of this paper is to extend previously proposed model for viscoelastic materials with fiber reinforcement making it capable to represent two important phenomena: the so-called Mullins effect and the softening at excessive strains. The model is based on a variational, thermodynamical consistent framework based on an incremental potential that allows for the representation of different dissipative material by simply changing the expression of potential functions and for the obtention of symmetric constitutive tangent matrices. Numerical examples show the capability of the proposed model to mimic with appreciable accuracy the experimentally observed mechanical behavior of soft tissues.
- Bioengineering Division
Variational Viscoelastic-Damage Model for Fiber Reinforced Soft Tissues
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Fancello, EA, & Vassoler, JM. "Variational Viscoelastic-Damage Model for Fiber Reinforced Soft Tissues." Proceedings of the ASME 2013 Summer Bioengineering Conference. Volume 1B: Extremity; Fluid Mechanics; Gait; Growth, Remodeling, and Repair; Heart Valves; Injury Biomechanics; Mechanotransduction and Sub-Cellular Biophysics; MultiScale Biotransport; Muscle, Tendon and Ligament; Musculoskeletal Devices; Multiscale Mechanics; Thermal Medicine; Ocular Biomechanics; Pediatric Hemodynamics; Pericellular Phenomena; Tissue Mechanics; Biotransport Design and Devices; Spine; Stent Device Hemodynamics; Vascular Solid Mechanics; Student Paper and Design Competitions. Sunriver, Oregon, USA. June 26–29, 2013. V01BT55A016. ASME. https://doi.org/10.1115/SBC2013-14404
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