Ultrasonic Biopolymer Characterisation by Hysteresis Quantification

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00316732" target="_blank" >RIV/68407700:21230/18:00316732 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21340/18:00316732

Result on the web

<a href="http://www.ndt.net/article/ndtp2017/papers/Zatloukalova.pdf" target="_blank" >http://www.ndt.net/article/ndtp2017/papers/Zatloukalova.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Ultrasonic Biopolymer Characterisation by Hysteresis Quantification

Original language description

Nonlinear characteristics are advanced indicators of the structure of viscoelastic materials. In this contribution, we focus on biopolymers (such as articular cartilage and skin tissue), and their typical amount of energy lost by mechanical loading/unloading represented by a hysteresis curve. For hysteresis modeling we use the Preisach-Mayergoyz space model, and restricted power distribution (Guyer extended distribution). Besides the power distribution parameters, the stress protocol is required as an input to obtain the modeled hysteresis curve, and to compare with experimental results. Knowing the experimental curve, an iterative numerical procedure for identification of true density function of opening and closing pressures was applied, and an optimization algorithm sought for the best (characteristic) distribution parameters for the specific soft tissue. For articular cartilage, experiments were performed on porcine patella sample in-situ using the device for ultrasound palpation. In the case of skin tissue, hysteresis curve was obtained from evaluation of the tensile force applied by the loading machine INSTRON 8800, and corresponding displacement measurement. The porcine skin tissue was loaded ex-vivo according to the basic loading-unloading protocol. The experimental results were compared to model hysteresis curves, and the typical model parameters were obtained by minimization of the L2-distance. For articular cartilage, the mean parameter values optimized by the simulated annealing algorithm were found (mean±standard deviation) α=0.25±0.01, and β=0.04±0.03, with L2-norm=0.3±0.02 for 10 repetitions. In the case of skin tissue, the model parameters were estimated as α=2.59±0.18, and β=0.59±0.32, with L2-norm=0.03±0.03 for 10 simulation runs. Material properties can be evaluated based on the described quantification, and potentially used for medical purposes and healing or cosmetics treatment evaluation.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10307 - Acoustics

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

e-Journal of NDT

ISSN

1435-4934

e-ISSN

1435-4934

Volume of the periodical

23

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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