Constitutive modeling of the human Anterior Cruciate Ligament (ACL) under uniaxial loading using viscoelastic prony series and hyperelastic five parameter Mooney-Rivlin model

Chakraborty, Souvik; Mondal, Debabrata; Motalab, Mohammad

doi:10.1063/1.4958358

Cited by 3 publications

(1 citation statement)

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“…Pawlikowski 50 developed the Moni‐Rivlin strain energy function into a viscoelastic‐plastic model and extracted the material parameters of polyurethane nanocomposites using relaxation and compression tests. Chakraborty et al 51 studied the strain of human ligament under uniaxial load with different strain rates. They used the five‐parameter Moni‐Rivlin model for the hyperelastic part and the Peroni series model for the visco part Endo and Pereira 52 developed a linear orthotropic viscoelasticity model based on the Peroni series for fiber‐reinforced thermoplastic materials and finally demonstrated its application in the injection molding industry.…”

Section: Introductionmentioning

confidence: 99%

Constitutive modeling of visco‐hyperelastic behavior of double‐network hydrogels using long‐term memory theory

Javadi

Darijani

Niknafs

2020

J of Applied Polymer Sci

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Double-network hydrogels with viscoelastic behavior are appropriate materials for biomechanical applications. In this article, the standard linear solid (SLS) rheological model for the linear viscoelastic materials is generalized to the viscoelastic materials with large nonlinear deformations. Based on this viewpoint, the constitutive equation is proposed as sum of two parts including the straindependent elastic stress, and the viscous stress, which depends on the strain and strain rate. The elastic part of the stress is modeled via considering a hyperelastic strain energy function, while the main core of the viscous stress part requires a time-dependent weight function to satisfy the long-term memory fading principle. In addition, the weight function is proposed such that it can capture the mechanical behavior trend corresponding to the strain and strain rate for a double-network hydrogel in the relaxation test. Finally, to evaluate the performance of the proposed constitutive equation for the mechanical behavior modeling of double-network hydrogels, the tests on these materials have been used, and the material parameters are determined from fitting the experimental results to the theory. The agreement of test and theory results showed that the proposed model is capable to model the mechanical behavior of double-network hydrogels.

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Section: Introductionmentioning

confidence: 99%