On the impact of geometry on global mechanical response of an isotropic hyperelastic fingertip model

Jérémy Dallard (1) , Xavier Merlhiot (1) , Sonia Duprey (2) , Xuguang Wang (2) , Alain Micaelli (1)

1 LSI - Laboratoire de Simulation Interactive
2 LBMC UMR T9406 - Laboratoire de Biomécanique et Mécanique des Chocs

Computational models of the human hand are key elements in the mechanical analysis of grasping and manipulation tasks, with applications in the ergonomics of industrial processes and products. This includes the modeling of soft tissues involved in the contact with objects, starting with the case of the fingertips. Although the influence of material properties in the modeling of fingertip soft tissues has been studied (either in the framework of linear elasticity or hyperelasticity), the influence of the geometry of these tissues is not well known. To model the shape of fingertips, two approaches are encountered: while the first one relies on segmentations from CT or MR scans, the second one consists in the construction of an idealized geometry based on simple primitives like portions of spheres, ellipsoids and elliptic cylinders. Based on finite element simulations, we present a study which quantifies the impact of variations in the geometry of the fingertip on its global response to contact against a plane surface.

Mots clés: BIOMECHANICAL HAND MODEL; FINGERTIP MODEL; SOFT TISSUE MODELING

Mots clés: BIOMECANIQUE; TISSU MOU

Domaines: Biomécanique [physics.med-ph]

Jérémy Dallard, Xavier Merlhiot, Sonia Duprey, Xuguang Wang, Alain Micaelli. On the impact of geometry on global mechanical response of an isotropic hyperelastic fingertip model. World Congress on Computational Mechanics XI, IACM - ECCOMAS 2014, Jul 2014, BARCELONE, Spain. 2 p. ⟨hal-01743560⟩