A contact stress model for multifingered grasps of rough objectsThe model developed utilizes a contact-stress analysis of an arbitrarily shaped object in a multifingered grasp. The fingers and the object are all treated as elastic bodies, and the region of contact is modeled as a deformable surface patch. The relationship between the friction and normal forces is nonlocal and nonlinear in nature and departs from the Coulomb approximation. The nature of the constraints arising out of conditions for compatibility and static equilibrium motivated the formulation of the model as a nonlinear constrained minimization problem. The model is able to predict the magnitude of the inwardly directed normal forces and both the magnitude and direction of the tangential (friction) forces at each finger-object interface for grasped objects in static equilibrium.
Document ID
19910050557
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sinha, Pramath Raj (Pennsylvania Univ. Philadelphia, PA, United States)
Abel, Jacob M. (Pennsylvania, University Philadelphia, United States)