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Full-Text Articles in Mechanical Engineering
Semi-Active Damping For An Intelligent Adaptive Ankle Prosthesis, Andrew K. Lapre
Semi-Active Damping For An Intelligent Adaptive Ankle Prosthesis, Andrew K. Lapre
Masters Theses 1911 - February 2014
Modern lower limb prostheses are devices that replace missing limbs, making it possible for lower limb amputees to walk again. Most commercially available prosthetic limbs lack intelligence and passive adaptive capabilities, and none available can adapt on a step by step basis. Often, amputees experience a loss of terrain adaptability as well as stability, leaving the amputee with a severely altered gait. This work is focused on the development of a semi-active damping system for use in intelligent terrain adaptive ankle prostheses. The system designed consists of an optimized hydraulic cylinder with an electronic servo valve which throttles the hydraulic …
Finite Element Analysis Of A Femur To Deconstruct The Design Paradox Of Bone Curvature, Sameer Jade
Finite Element Analysis Of A Femur To Deconstruct The Design Paradox Of Bone Curvature, Sameer Jade
Masters Theses 1911 - February 2014
The femur is the longest limb bone found in humans. Almost all the long limb bones found in terrestrial mammals, including the femur studied herein, have been observed to be loaded in bending and are curved longitudinally. The curvature in these long bones increases the bending stress developed in the bone, potentially reducing the bone’s load carrying capacity, i.e. its mechanical strength. Therefore, bone curvature poses a paradox in terms of the mechanical function of long limb bones. The aim of this study is to investigate and explain the role of longitudinal bone curvature in the design of long bones. …
Investigating The Relationship Between Material Property Axes And Strain Orientations In Cebus Apella Crania, Christine M. Dzialo
Investigating The Relationship Between Material Property Axes And Strain Orientations In Cebus Apella Crania, Christine M. Dzialo
Masters Theses 1911 - February 2014
Probabilistic finite element analysis was used to determine whether there is a statistically significant relationship between maximum principal strain orientations and orthotropic material stiffness orientations in a primate cranium during mastication. We first sought to validate our cranium finite element model by sampling in-vivo strain and in-vivo muscle activation data during specimen mastication. A comparison of in vivo and finite element predicted (i.e. in silico) strains was performed to establish the realism of the FEM model. To the best of our knowledge, this thesis presents the world’s only complete in-vivo coupled with in-vitro validation data set of a primate cranium …