Mechanical behavior measurement of the sheep small intestine using experimental tests | ||
| Iranian Journal of Veterinary Medicine | ||
| مقاله 6، دوره 10، شماره 3، 2016، صفحه 201-207 اصل مقاله (1.47 M) | ||
| نوع مقاله: Pathology - Clinical Pathology | ||
| شناسه دیجیتال (DOI): 10.22059/ijvm.2016.58682 | ||
| نویسندگان | ||
| Aisa Rassoli؛ Nasser Fatouraee* | ||
| Biological Fluid Dynamics Laboratory, Biomechanics Department, Biomedical Engineering Faculty, Amirkabir University of Technology, Tehran, Iran | ||
| چکیده | ||
| Background: There is no consistent data on the mechanical properties of sheep intestine. OBJECTIVES: We performed a series of biaxial strain measurement experiments and extracted the constitutive model to describe the mechanical characteristics of the sheep intestinal tissue. METHODS: Eleven specimens were obtained freshly from sacrificed sheep and the planar biaxial tests were performed on the tissue specimens by applying simultaneous loads along the circumfer-ential and longitudinal directions. Then the measured data were fitted into the anisotropic four-parameter Fung-type model and also to the modified Mooney-Rivlin model. RESULTS: The specimens showed some degree of anisotropy; the stiffer direction is not gener-ally predictable. Some of the specimens were stiffer in the circumferential direction, and the others in the longitudinal direction. However, the average results state the circumferential di-rection as the stiffer orientation. CONCLUSIONS: It can be concluded that sheep intestine be-haves normally as a nonlinear anisotropic tissue which is well-characterized by the modified Mooney-Rivlin model. | ||
| کلیدواژهها | ||
| anisotropic constitutive model؛ fung-type model؛ nonlinear tissue؛ modify Mooney-Rivlin model؛ strain-energy function | ||
| مراجع | ||
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