Comparison of different constitutive models to characterize the viscoelastic properties of human abdominal adipose tissue. A pilot study

Calvo-Gallego, José Luis; Domı́nguez, J.; Cía, Tomás Gómez; Gómez-Ciriza, Gorka; Martínez-Reina, Javier

doi:10.1016/j.jmbbm.2018.02.013

Cited by 29 publications

(11 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A Prony series is commonly used for G true¯ ( t ) , as in Commisso et al 6 and Calvo-Gallego et al 7 In this case, four terms were used:…”

Section: Methodsmentioning

confidence: 99%

“…The fitting methodology was taken from Calvo-Gallego et al, 7 being the core of the algorithm a least squares minimization. However, this is a local gradient-based method and therefore it can be sensitive to the initial guess in certain nonlinear problems.…”

Section: Methodsmentioning

confidence: 99%

“…This alternative protocol has been previously published and tested for other tissues such as cartilage and adipose tissue. 6–8…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evolution of relaxation properties of callus tissue during bone transport

Calvo-Gallego

Mora‐Macías

Reina-Romo

et al. 2022

Proc Inst Mech Eng H

Self Cite

View full text Add to dashboard Cite

Callus tissue exhibits a viscoelastic behavior that has a strong influence on the distribution of stresses and their evolution with time and, thus, it can affect tissue differentiation during distraction procedures. For this reason, a deep knowledge of that viscoelastic behavior can be very useful to improve current protocols of bone distraction and bone transport. Monitoring stress relaxation of the callus during distraction osteogenesis allows characterizing its viscoelastic behavior. Different procedures have been used in the literature to fit the response of a given viscoelastic model to the force relaxation curve. However, these procedures do not ensure the uniqueness of that fit, which is of the utmost importance for statistical purposes. This work uses a fitting procedure already validated for other tissues that ensures that uniqueness. Very importantly too, the procedure presented here allows obtaining more information from the stress relaxation tests, distinguishing relaxation in different time scales, which provides a deeper insight into the viscoelastic behavior and its evolution over time. As it was observed in the results, relaxation is faster at the first days after osteotomy and becomes slower and more gradual with time. This fact can be directly linked to the temporal evolution of the callus composition (water, organic phase, and mineral content) and also to the progression of tissue differentiation, with a prevalence of hard tissues as time passes.

show abstract

“…A Prony series is commonly used for G true¯ ( t ) , as in Commisso et al 6 and Calvo-Gallego et al 7 In this case, four terms were used:…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of relaxation properties of callus tissue during bone transport

Calvo-Gallego

Mora‐Macías

Reina-Romo

et al. 2022

Proc Inst Mech Eng H

Self Cite

View full text Add to dashboard Cite

show abstract

“…The material behaviour of adipose tissue has been investigated in several studies under different loading conditions. Compressive behaviour was analysed using setups for uniaxial confined or unconfined compression or indentation testing for porcine and ovine subcutaneous adipose tissue, human abdominal tissue, human breast tissue, the human calcaneal fat pad and human plantar soft tissue [29][30][31][32][33][34][35][36][37][38][39]. Results show that adipose tissue behaves non-linear, exhibiting a J-shaped stress-strain response, typical for hyperelastic materials [27,33,36,38].…”

Section: Introductionmentioning

confidence: 99%

“…Some of the aforementioned studies also investigate the influence of loading velocity on adipose tissue behaviour [ 27 , 30 , 32 , 33 , 36 , 40 , 42 ]. Stress–strain response of adipose tissue seems to be strain rate dependent with higher loading velocities resulting in stiffer material behaviour.…”

Section: Introductionmentioning

confidence: 99%

Experimental characterisation of porcine subcutaneous adipose tissue under blunt impact up to irreversible deformation

et al. 2021

View full text Add to dashboard Cite

A deeper understanding of the mechanical characteristics of adipose tissue under large deformation is important for the analysis of blunt force trauma, as adipose tissue alters the stresses and strains that are transferred to subjacent tissues. Hence, results from drop tower tests of subcutaneous adipose tissue are presented (i) to characterise adipose tissue behaviour up to irreversible deformation, (ii) to relate this to the microstructural configuration, (iii) to quantify this deformation and (iv) to provide an analytical basis for computational modelling of adipose tissue under blunt impact. The drop tower experiments are performed exemplarily on porcine subcutaneous adipose tissue specimens for three different impact velocities and two impactor geometries. An approach based on photogrammetry is used to derive 3D representations of the deformation patterns directly after the impact. Median values for maximum impactor acceleration for tests with a flat cylindrical impactor geometry at impact velocities of 886 mm/s, 1253 mm/s and 2426 mm/s amount to 61.1 g, 121.6 g and 264.2 g, respectively, whereas thickness reduction of the specimens after impact amount to 16.7%, 30.5% and 39.3%, respectively. The according values for tests with a spherically shaped impactor at an impact velocity of 1253 mm/s are 184.2 g and 78.7%. Based on these results, it is hypothesised that, in the initial phase of a blunt impact, adipose tissue behaviour is mainly governed by the behaviour of the lipid inside the adipocytes, whereas for further loading, contribution of the extracellular collagen fibre network becomes more dominant.

show abstract