ArticleBiomechanics and modeling in mechanobiology2020
Nonlinear viscoelastic constitutive model for bovine liver tissue.
Article in Biomechanics and modeling in mechanobiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 43 citations in OpenAlex.
- Usage of the adaptive quasi-linear viscoelastic model to predict load-unload, stress-relaxation, and sine load of porcine liver.Scientific reports · 2026Article
- Characterization of mechanical damage and viscoelasticity on aortas from guinea pigs subjected to hypoxia.Scientific reports · 2025Article
- Rheological and Lipid Characterization of Minipig and Human Skin Tissue: A Comparative Study Across Different Locations and Depths.Annals of biomedical engineering · 2025Article
- A viscoelastic constitutive framework for aging muscular and elastic arteries.Acta biomaterialia · 2024Article
- A viscoelastic constitutive model for human femoropopliteal arteries.Acta biomaterialia · 2023Article
- Longitudinal Changes in MR Elastography-based Biomarkers in Obese Patients Treated with Bariatric Surgery.Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association · 2023Article
- An introduction to the Ogden model in biomechanics: benefits, implementation tools and limitations.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2022Article
- Comprehensive experimental assessments of rheological models' performance in elastography of soft tissues.Acta biomaterialia · 2022Article
- Viscoelasticity, Like Forces, Plays a Role in Mechanotransduction.Frontiers in cell and developmental biology · 2022Review
- An efficient and accurate method for modeling nonlinear fractional viscoelastic biomaterials.Computer methods in applied mechanics and engineering · 2020Article
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Authors and funding
4 authors at 3 institutions in 4 countries.
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Abstract
Soft tissue mechanical characterisation is important in many areas of medical research. Examples span from surgery training, device design and testing, sudden injury and disease diagnosis. The liver is of particular interest, as it is the most commonly injured organ in frontal and side motor vehicle crashes, and also assessed for inflammation and fibrosis in chronic liver diseases. Hence, an extensive rheological characterisation of liver tissue would contribute to advancements in these areas, which are dependent upon underlying biomechanical models. The aim of this paper is to define a liver constitutive equation that is able to characterise the nonlinear viscoelastic behaviour of liver tissue under a range of deformations and frequencies. The tissue response to large amplitude oscillatory shear (1-50%) under varying preloads (1-20%) and frequencies (0.5-2 Hz) is modelled using viscoelastic-adapted forms of the Mooney-Rivlin, Ogden and exponential models. These models are fit to the data using classical or modified objective norms. The results show that all three models are suitable for capturing the initial nonlinear regime, with the latter two being capable of capturing, simultaneously, the whole deformation range tested. The work presented here provides a comprehensive analysis across several material models and norms, leading to an identifiable constitutive equation that describes the nonlinear viscoelastic behaviour of the liver.
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