Mathematical modeling and production of semi-active hand prosthesis from clear resin

Abstract

In this study, the static, kinematic and dynamic behaviors of a semi-active hand prosthesis were analyzed numerically. Finite Elements method was used in static analysis and analytical method was used in kinematic and dynamic analysis. The mathematical model of the hand was created in kinematic and dynamic analysis. Using the mathematical model obtained, torque values of 0, 15, 30, 45, 60, 75, 90 degrees were calculated according to the different position angles of the fingers. Examination was performed for 4 fingers (index finger, middle finger, ring finger, little finger) and 5 kg of force was applied to the fingertips perpendicular to the finger plane. In this examination, the forces are divided into 25% for the index finger, 35% for the middle finger, 25% for the ring finger and 15% for the little finger. The results obtained for forces at different angles under the specified conditions were explained. As a result of all these stages, the prosthetic hand was designed. The design was calculated as linear statically by the finite element method. As a result of the study, a semi-active prosthetic hand was produced considering the calculation findings. Clear resin was used as material.

Modeling and Simulation Process via Incremental Methods of a Production-Aimed Upper Limb Prosthesis

“…The prosthetic hand was assembled on a 3D printer using clear resin. This prosthetic hand provided the amputee with cosmetic, appearance, and control sensitivity that did not attract much attention in society and positively affected the person [12]. Additive manufacturing for prosthetic sockets using clinical settings reduces costs [13].…”