Predicting the mechanical response of the vaginal wall in ball burst tests based on histology

A histologically motivated (HM) coefficient that establishes a link between tissue's microstructure and material model through histological data is used in the prediction of the mechanical properties of vaginal tissue that is subjected to multiaxial loading conditions. Therefore, the material p...

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Veröffentlicht in:Journal of biomedical materials research. Part B, Applied biomaterials Applied biomaterials, 2020-07, Vol.108 (5), p.1925-1933
Hauptverfasser: Ferreira, João P. S., Rynkevic, Rita, Martins, Pedro A. L. S., Parente, Marco P. L., Famaey, Nele M., Deprest, Jan, Fernandes, António A.
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container_end_page 1933
container_issue 5
container_start_page 1925
container_title Journal of biomedical materials research. Part B, Applied biomaterials
container_volume 108
creator Ferreira, João P. S.
Rynkevic, Rita
Martins, Pedro A. L. S.
Parente, Marco P. L.
Famaey, Nele M.
Deprest, Jan
Fernandes, António A.
description A histologically motivated (HM) coefficient that establishes a link between tissue's microstructure and material model through histological data is used in the prediction of the mechanical properties of vaginal tissue that is subjected to multiaxial loading conditions. Therefore, the material parameters were based on an HM coefficient obtained from tensile testing and histological data of comparable tissues. Uniaxial tensile test data and histological data were collected from three groups of sheep at different time points in their life cycle, including virgins, pregnant, and parous ewes. From this data, a correlation between material parameters and histological data was obtained. Spherical indentation (ball burst [BB]) tests were then performed in specimens with similar tissue structure. The histological data of these samples were used in conjunction with the correlations already established for the uniaxial samples data, to define the material parameters of the BB samples. Mechanical properties of the BB specimens were predicted through basic histology and using finite element modeling (FEM) simulations, without direct mechanical measurements. The predicted force and displacement values of the FEM simulation displayed a good correlation with the experimental (BB) testing results. No fitting of the BB results was performed. In this way, the use of uniaxial tests coupled with useful histological information offers a promising approach to predicting macroscopic material behavior under multiaxial loading conditions in biomechanics.
doi_str_mv 10.1002/jbm.b.34534
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source Wiley Online Library - AutoHoldings Journals
subjects biomechanical properties
Biomechanics
Biomedical materials
Burst tests
Computer simulation
Correlation
Finite element method
genetic algorithm
Histology
hyperelastic model
Indentation
Life cycles
Materials research
Materials science
Mathematical models
Mechanical analysis
Mechanical measurement
Mechanical properties
Parameters
Sheep
Tensile tests
Tissues
Uniaxial tests
Vagina
vaginal tissue
title Predicting the mechanical response of the vaginal wall in ball burst tests based on histology
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