Influence of the biological origin of the liver on the constitutive and failure properties of the hepatic parenchyma
Résumé
The aim of this study is to investigate the influence of the biological origin and the preservation method (freezing or not) on the hepatic parenchyma mechanical properties. Uniaxial tensile tests are conducted on human and porcine liver samples to characterize the parenchyma constitutive and failure properties. A statistical analysis revealed that the ultimate true stress is significantly higher on porcine parenchyma; the modulus also seems to be affected. For both origins, the ultimate stress is clearly modified by freezing. Microstructure observations revealed a large difference between porcine and human parenchymas' failure mechanisms, explaining the gap between the ultimate stresses. Using porcine parenchyma to mimic human parenchyma is therefore not satisfactory, especially in terms of failure properties.
Domaines
Biomécanique [physics.med-ph]
Origine : Fichiers produits par l'(les) auteur(s)
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