INVESTIGATIONS OF THE VISCOELASTICITY OF ESOPHAGEAL TISSUE USING INCREMENTAL STRESS-RELAXATION TEST AND CYCLIC EXTENSION TEST

Autor:	C. K. Chong, T. C. Fung, W. Yang, K. S. Chian
Rok vydání:	2006
Předmět:	Esophageal Tissue Hysteresis Materials science business.industry Biomedical Engineering Material constants Structural engineering Composite material Cyclic test business Stress relaxation test Viscoelasticity
Zdroj:	Journal of Mechanics in Medicine and Biology. :261-272
ISSN:	1793-6810 0219-5194
DOI:	10.1142/s0219519406001984
Popis:	The time-dependent mechanical properties of porcine esophagus were investigated experimentally and theoretically. It was hypothesized that the viscoelasticity was quasi-linear. The incremental stress-relaxation test was conducted to identify the material constants included in the quasi-linear viscoelastic (QLV) model. To verify the predictive ability of the model, the incremental cyclic test was performed. Hysteresis was calculated and compared with that predicted by the model. Results showed that stresses relaxed by 20–30% within the first 10 s and stabilized at 50% at 300 s. The QLV model was shown to be able to describe the viscoelasticity of esophagus across various stretch levels. The model could also predict the hysteresis during cyclic test well. It suggested that the QLV could be used as the material characterization of esophageal tissue.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::838caba81e4e11e0a6d483643bf9fc91 https://doi.org/10.1142/s0219519406001984 Zobrazit plný text záznamu