Original title: Ultrasonic biopolymer characterisation by hysteresis quantification
Authors: Zatloukalová, Jana ; Tokar, Daniel ; Kopecká, Karolína ; Převorovský, Zdeněk
Document type: Papers
Conference/Event: International Workshop of NDT Experts /9./, Praha (CZ), 20171009
Year: 2017
Language: eng
Abstract: 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 PreisachMayergoyz 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. Material properties can be evaluated based on the described quantification, and potentially used for medical purposes and healing or cosmetics treatment evaluation.
Keywords: biopolymers; hysteresis; ultrasound
Project no.: GA17-22615S (CEP)
Funding provider: GA ČR
Host item entry: NDT in PROGRESS, ISBN 978-80-87012-63-5

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0279213

Permalink: http://www.nusl.cz/ntk/nusl-371067


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers