Design and analysis of regenerative effort assistive prosthetic leg for lower extremity disability

Abstract

This research project focused on the design and analysis of a regenerative effort newlineassistive prosthetic leg for lower extremity disabled individuals. Regardless of the developments in technology, above-knee amputees still indicates significant deficiencies newlinein walking patterns, speed in walking. Lower limbs are exposed to an immense amount newlineof impact forces during walking cadence and ambulators rely on various systems to newlineshield the musculoskeletal arrangement from external shocks that inflict injury. In this newlineresearch, a novel pneumatic-controlled biomimetic articulated passive prosthetic knee newlinesystem with a spring-loaded mechanism was modelled to support early and late swing newlineand stance control. The need for adaptive design of Regenerative effort assistive Smart newlinePylon (RSP) with a Smart foot adapter (SFA) and wave spring suspension mechanism newlineto resist static and dynamic impact load of 60-100 kgs amputee and also stabilizes to newlineground reaction forces (GRF) without falling. Both functional knee and pylon models newlinewere developed using Catia software for various activities, and the analyses were conducted in AUTODESK FUSION 360 software. Stress maximum, axial, bending, and newlinetorsional stresses were assessed for Al 6061 T6 material. Pure PETG was incorporated newlinewith MWCNT nanofillers at 0.3 wt.% and Nylon(PA6) extruded as a filament through a newlinetwin screw extruder with a 1.75 mm diameter and printed with ASTM standards on 3D newlineprinting machine, Various tests were performed on four types of specimens: uncoated newlinepure PETG, PETG-MWCNT, and their metal-layer-coated counterparts. Similarly tests newlinewere performed for PA6 combination with MWCNT(0.5 wt.%) and CF(15 wt.%). The newlinestudy revealed that adding MWCNTs to a metal layer electroless coating of PETG and newlineMWCNT+CF for Nylon improved the surface and mechanical properties and this is newlinesuitable for many applications including Prosthesis. newline