RAMALHO, A. [et al.] (2022) - Influence of materials and their constitutive laws on the stress fields produced in the residual limb of a transfemoral amputation. In LEI, X., KORVANOV, V.V. (eds) - Proceedings of 5th International Conference on Mechanical, System and Control Engineering . ICMSC 2021. Lecture Notes in Mechanical Engineering. Springer, Singapore.
10.1007/978-981-16-9632-9_7
Title
Influence of materials and their constitutive laws on the stress fields produced in the residual limb of a transfemoral amputation
Subject
Finite element analysis Interfacial stresses Transfemoral amputation Constitutive law Friction
Date
2022-12-12T09:52:25Z 2022-12-12T09:52:25Z 2022-01
Description
Current research uses a finite element analysis to characterize the effect of the materials mechanical and tribological properties on the interaction between the biological tissues of a transfemoral amputation and the combined prosthesis. Considering that both friction and mechanical properties influence the stress distribution between different interfaces, these were analyzed on the contacts of the prosthesis and the liner, the liner and the soft tissues and, finally, the soft tissues and the cortical bone. This is of significant importance, as it has been acknowledged that the shear stress distribution at these interfaces significantly impacts the patients’ comfort. These shear stresses have also been reported as one of the leading causes of pressure ulcers in osteotomized patients. Finally, this research discusses the influence of the soft tissues and the liner constitutive law in the stress field generated at the biological tissues. In particular, for the liner, the results using a linear elastic model are compared with those using the Mooney-Rivlin hyperelastic model. The results using a linear elastic model are compared with the Neo-Hookean and Ogden models’ results for the soft tissues. info:eu-repo/semantics/publishedVersion
