Ultrasonic Biopolymer Characterisation by Hysteresis Quantification

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68407700:21340/18:00316732

Výsledek na webu

<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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Jazyk výsledku

angličtina

Název v původním jazyce

Ultrasonic Biopolymer Characterisation by Hysteresis Quantification

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Ultrasonic Biopolymer Characterisation by Hysteresis Quantification

Popis výsledku anglicky

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.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10307 - Acoustics

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

e-Journal of NDT

ISSN

1435-4934

e-ISSN

1435-4934

Svazek periodika

23

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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