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Stress Distribution And Optimum Design Of Polypropylene And Laminated Transtibial Prosthetic Sockets Fem And Experimental Implementations
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Book Synopsis Stress Distribution and Optimum Design of Polypropylene and Laminated Transtibial Prosthetic Sockets. FEM and Experimental Implementations by : Hayder Al-Shuka
Download or read book Stress Distribution and Optimum Design of Polypropylene and Laminated Transtibial Prosthetic Sockets. FEM and Experimental Implementations written by Hayder Al-Shuka and published by GRIN Verlag. This book was released on 2018-02-08 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific Study from the year 2017 in the subject Medicine - Other, , language: English, abstract: This study presents analyses for below knee prosthetic socket of a human. Socket stress distribution is performed on three types of socket, polypropylene (5mm), polypropylene (3mm) and a standard laminate (3mm) sockets to determine the stresses path through the prosthetic socket during the gait cycle. It is found that heel strike phase is the critical phase. The stresses increase at the socket base while the maximum deflection is maximum at the patellar region of the socket. This work is achieved by finite element program, ANSYS. The development of design specifications of a below the knee prosthetic socket is presented in this study for successful ambulation and comfort. Seven different design models are created by changing the socket wall thickness and the material. Polypropylene socket gives the best results with regard to the allowable deflection for the regions of the pressure relief areas of the stump. The effect of varying the modulus of elasticity on the polypropylene socket is considered in this study. Three models are analyzed with different tensile creep moduli during different periods. It is found that the polypropylene socket will enlarge in size with time. An experimental study is conducted to compare the strength of five prosthetic sockets made of different materials. Compression, three-point flexural and tensile tests are implemented by the Testometric machine. The laminate sockets have larger compressive stiffness than polypropylene while polypropylene has larger flexural stiffness than the tested laminates except for socket No.5.
Book Synopsis Modeling and fabrication of prosthetic sockets using selective laser sintering by :
Download or read book Modeling and fabrication of prosthetic sockets using selective laser sintering written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Successful rehabilitation of transtibial amputees involves effective fitting of prosthetic components. However, conventional techniques used to produce sockets with suitable characteristics are labor intensive and expensive, and depend on the work of skilled prosthetists that are relatively scarce compared to the number of transtibial amputees. Selective Laser Sintering (SLS) is a very promising technique for producing subject-specific sockets for transtibial amputee prostheses due to its inherent ability to create complex three-dimensional objects directly from digital shape information without the need for specific tooling, molds or human labor. This dissertation presents a framework for the design, analysis, manufacture and testing of SLS sockets for transtibial prostheses, including the development of a computer-aided design model of the socket with compliant features to enhance comfort, structural analysis using a Finite Element Method (FEM) model, fabrication of a functional prototype using SLS, and experimental validation of the FEM analysis. The validation involved quantifying the failing conditions of sockets manufactured using the framework during destructive tests. The experimental failure loads for the sockets were within a 3% range of the FEM results and were considered satisfactory. The specific design of orthogonally compliant features for socket was also analyzed. This process included the preliminary evaluation of design alternatives using FEM with validation through experimental measurements, definition of specific design methodology for the best alternatives, incorporation of solution within the socket and refinement of design using auxiliary features obtained through topology optimization. Finally, to investigate the structural response of the SLS socket during gait, a FEM model (acquired from Computed Tomography data of a transtibial amputee) composed of a socket, liner and residual limb under quasi-static loading derived from typical ground reaction forces was employed. Three different compliant designs were evaluated to assess their ability to locally relieve local pressure during the stance phase of gait, as well as their structural integrity to ensure safety. The design with a compliant feature consisting of spiral slots within the socket wall was determined to produce a local average relief of 65.8% in the interface pressure, reducing the peak pressure from 172 kPa to 66.4 kPa.
Book Synopsis Assessing Two Designs of Trans-tibial Prosthetic Sockets by Experimental Measurement and Numerical Analysis by : Ming-Ji Tzeng
Download or read book Assessing Two Designs of Trans-tibial Prosthetic Sockets by Experimental Measurement and Numerical Analysis written by Ming-Ji Tzeng and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Verification of a Finite Element Analysis Model for Predicting Deflection of Actively Actuated Prosthetic Sockets by : Rafael Rodriguez
Download or read book Design and Verification of a Finite Element Analysis Model for Predicting Deflection of Actively Actuated Prosthetic Sockets written by Rafael Rodriguez and published by . This book was released on 2011 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lower limb prosthesis provides assistance to its user in both ambulation and stationary support. The lower limb prosthesis consists of a socket, which interfaces with the residual limb, a pylon, attachment hardware to secure the pylon to the socket, and a prosthetic foot. For the prosthesis to be effective, the socket must be comfortable, functional and aesthetically appealing, usually in that order. Lack of comfort and fit can cause movement problems and health issues. The residual limb of the amputee changes its volume throughout the day and in order to maintain comfort a socket must be able to adapt to these volume changes. Previous research has resulted in the development of concepts for inflatable prosthetic sockets capable of addressing this need. The concepts rely on laser sintering (LS) to manufacture the parts. This research focuses on the development of a finite element analysis (FEA) method to assist in the design of adaptive sockets. The FEA can be used to predict the pressure-deflection curve of a given socket design. The FEA method was verified by experiments using LS manufactured test specimens. Results from FEA simulations indicate that the LS-manufactured sockets will achieve the desired deflection (~0.1 in) for relatively low pressures (
Book Synopsis Trans-tibial Prosthetic System Design and Benefits for the Amputee, Service Providers and Society by : Tim Dumbleton
Download or read book Trans-tibial Prosthetic System Design and Benefits for the Amputee, Service Providers and Society written by Tim Dumbleton and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two trans-tibial socket concepts are in regular use in prosthetic clinics. These may be categorised as the "hands-on" (hand casting) concept and "hands-off' (pressure casting) concept which, in addition to the distinctive casting methods, require different liner materials and components to create the desired loading distribution. Amputees have stated that quality of fit of the prosthetic socket is of highest importance, but, although pressure distribution has long been regarded as important, there is no general consensus regarding socket fit criteria. Furthermore, the casting process is carried out with the limb stationary. During walking the pressure distribution will change constantly throughout the gait cycle. The quality of fit of the prosthesis remains very subjective with little quantitative information regarding the pressure distribution within the socket. The aim of this study was to investigate and to compare the dynamic interface pressure distribution of the two socket concepts for a trans-tibial amputee population. In addition, the impact of the two socket concepts on their daily living activities was assessed. The objective was to relate measured pressure distribution to activity level and patient acceptance and thus increase understanding of what constitutes a good socket fit. The dynamic interface pressure distribution inside the socket of 48 patient's own prosthesis was recorded, using a validated pressure measurement system. The dynamic pressures recorded between the residual limb and the prosthetic socket showed similar distributions between the different casting concepts, although overall the hands-off sockets showed higher pressures than the hands-on group. The results from the questionnaire indicated that the quality of fit of the prosthetic socket had a strong correlation with user satisfaction. Results of this study have shown that the impacts of the two distinct prosthetic socket concepts have on the life of the amputee are very similar. Most of the participants used their prosthetic device regularly, and responded in similar ways regardless of the type of socket worn.
Book Synopsis The Use of a Novel Residuum Model to Design a Variable-impedance Transtibial Prosthetic Socket by : David Moinina Sengeh
Download or read book The Use of a Novel Residuum Model to Design a Variable-impedance Transtibial Prosthetic Socket written by David Moinina Sengeh and published by . This book was released on 2016 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: For people living with limb amputation, the prosthetic socket - the interface between the residuum and prosthesis - is the most critical component. When a socket is uncomfortable, especially due to poor fit, the quality of life for a patient is greatly hindered. However, conventional design of sockets is largely artisan, with limited input of quantitative data. Current computer-aided and manufacturing (CAD/CAM) designs are still not clinically applicable solutions. Due to model identification procedures that employ non patient-specific and incomplete data sets, today's finite element (FE) models of the residuum are not predictive, leading to suboptimal socket designs. As such, there exists a need for a comprehensive biomechanical model of the residuum for the quantitative design and computational evaluation of patient-specific prosthetic sockets. This thesis presents a combined experimental-numerical approach to evaluate and validate a transtibial residuum biomechanical model. The central hypothesis of the work is that a single biomechanical model can predict the large non-linear response at various sites on a residuum under load. To evaluate this hypothesis, a non-linear, two-tissue model was formulated where tissue geometries were defined using MRI data of the residuum. The non-linear viscoelastic material parameters of the model were identified through inverse FEA-based optimization using in-vivo indentation experimental data at four locations. Using optimized model tissue parameters, the mean percentage error (mean absolute error/ maximum experimental force) between the experimental and simulation force-time curves at 14 other locations across the evaluated transtibial residuum was 7 ± 3%. Using this same modeling methodology and a single set of material constants to describe the bulk soft tissue biomechanical response of seven distinct transtibial residual limb models, the average percentage error for indentations at multiple locations across all seven limbs was 7 ± 1%. From these predictive models of residuum limbs, one rigid novel socket and two multimaterial transtibial sockets were designed, fabricated and evaluated through an entirely quantitative, automated and repeatable methodology. In a preliminary clinical investigation, the novel sockets were shown to reduce peak contact pressures at the tibia and fibular head regions on the residuum by significant amounts during standing compared to a conventional socket interface designed and fabricated by a trained prosthetist.
Book Synopsis A Synergistic Approach to Transtibial Socket Interface Mechanics by : Amy Lorraine Lenz
Download or read book A Synergistic Approach to Transtibial Socket Interface Mechanics written by Amy Lorraine Lenz and published by . This book was released on 2017 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Structural Analysis and Manufacture of Transtibial Prosthetic Sockets with 3D Printing by : Andrea Ballart Iglesias
Download or read book Design, Structural Analysis and Manufacture of Transtibial Prosthetic Sockets with 3D Printing written by Andrea Ballart Iglesias and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This project will cover how to design, validate and manufacture prostheses with 3D printing; specifically, transtibial prosthetic sockets. The project starts with a research on 3D printing and its applications, as well as 3D printing types and materials. Besides, the project covers a complete research on prostheses and its classification. Then, the project is focused specifically on transtibial prostheses, and its components and types are described. All components except the socket are available in the market as standard parts, and they just need to be properly selected to satisfy patients' requirements. On the other hand, the socket must be completely designed and customized for each patient. For this reason, manufacturing prosthetic sockets with 3D printing technology brings a huge variety of advantages, which are carefully described in this project. Afterwards, a study of human movements and stump critical anatomical areas has been done. In addition, a kinematic and dynamic analysis of the human leg and socket has been carried out. With these specifications, an initial prosthetic socket has been designed with a CAD software chosen. When the initial socket has been designed, a validation and geometry iteration phase has been carried out. The suitable 3D printing material has been chosen, and a Finite Elements Analysis has been done with Ansys software. The maximum loads during a human gait cycle calculated in the dynamic analysis have been applied in the FE analysis. The objective of the FE analysis is to prove the maximum equivalent stress and deformations that the prosthetic socket can support without failure based on the ultimate strength of the material chosen. Geometry and thickness modifications of the socket have been needed to obtain the desired safety factor. After all these steps, the final socket has been designed, validated and 3D printed successfully. Finally, results obtained have been compared to traditional socket characteristics. A business case of prosthetic sockets manufacturing with 3D printing versus traditional manufacturing has been developed and a list of potential next steps has been defined.
Author :American Academy of Orthopaedic Surgeons Publisher :Amer Academy of Orthopaedic ISBN 13 :9780892032754 Total Pages :930 pages Book Rating :4.0/5 (327 download)
Book Synopsis Atlas of Limb Prosthetics by : American Academy of Orthopaedic Surgeons
Download or read book Atlas of Limb Prosthetics written by American Academy of Orthopaedic Surgeons and published by Amer Academy of Orthopaedic. This book was released on 2002-01-01 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: Newly available after being out of print for several years, this is the definitive reference on the surgical and prosthetic management of acquired or congenital limb loss. Covers indications for amputation vs. limb salvage for trauma, peripheral vascular disease, and tumours; indications for prostheses for amputation levels; and rehabilitation approaches.
Book Synopsis Biomechanics of Lower Limb Prosthetics by : Mark R. Pitkin
Download or read book Biomechanics of Lower Limb Prosthetics written by Mark R. Pitkin and published by Springer. This book was released on 2009-10-14 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from a Clinical Biomechanist, Applied Physiologist and Prosthetist teaching graduate students in Prosthetics & Orthotics. While there are many books on Biomechanics, arguably the quintessential science of limb prosthetics, none addresses the fundamental principles in sufficient detail and depth to be practically useful to the prosthetist, rehabilitation specialist or researcher. Dr. Pitkin’s monograph is an exemplary collection of theoretical principles from his research and o- ers, presented in its clinical and applied biomechanics form. The textbook provides an excellent overview of the many facets of lower limb prosthetic design and engineering for the ardent clinician researcher and student. The book delves into many of the basic concepts that are required knowledge for the clinician and the scientist to have as the foundation for their work. Dr. Pitkin has an e- quent manner in which he reflects on the history and literature to tell the storied evolution of prosthetic design . He takes the reader on a journey to consider his theories, which have substantive foundations to contemplate. By the end of chapter one, we have the basic h- tory and an appreciation for the rationale behind the “rolling joint ankle” with evidence to support his theoretical views.
Download or read book Wearable Robots written by José L. Pons and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wearable robot is a mechatronic system that is designed around the shape and function of the human body, with segments and joints corresponding to those of the person it is externally coupled with. Teleoperation and power amplification were the first applications, but after recent technological advances the range of application fields has widened. Increasing recognition from the scientific community means that this technology is now employed in telemanipulation, man-amplification, neuromotor control research and rehabilitation, and to assist with impaired human motor control. Logical in structure and original in its global orientation, this volume gives a full overview of wearable robotics, providing the reader with a complete understanding of the key applications and technologies suitable for its development. The main topics are demonstrated through two detailed case studies; one on a lower limb active orthosis for a human leg, and one on a wearable robot that suppresses upper limb tremor. These examples highlight the difficulties and potentialities in this area of technology, illustrating how design decisions should be made based on these. As well as discussing the cognitive interaction between human and robot, this comprehensive text also covers: the mechanics of the wearable robot and it’s biomechanical interaction with the user, including state-of-the-art technologies that enable sensory and motor interaction between human (biological) and wearable artificial (mechatronic) systems; the basis for bioinspiration and biomimetism, general rules for the development of biologically-inspired designs, and how these could serve recursively as biological models to explain biological systems; the study on the development of networks for wearable robotics. Wearable Robotics: Biomechatronic Exoskeletons will appeal to lecturers, senior undergraduate students, postgraduates and other researchers of medical, electrical and bio engineering who are interested in the area of assistive robotics. Active system developers in this sector of the engineering industry will also find it an informative and welcome resource.
Book Synopsis Formulas for Stress, Strain, and Structural Matrices by : Walter D. Pilkey
Download or read book Formulas for Stress, Strain, and Structural Matrices written by Walter D. Pilkey and published by John Wiley & Sons. This book was released on 2005 with total page 1544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description
Book Synopsis Prosthetic Designs for Restoring Human Limb Function by : William Craelius
Download or read book Prosthetic Designs for Restoring Human Limb Function written by William Craelius and published by Springer Nature. This book was released on 2021-07-30 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a thorough introduction and overview of the design and engineering of state-of-the-art prosthetics and assistive technologies. Innovations in prosthetics are increasingly made by cross-disciplinary thinking, and the author introduces the application of biomedical, mechanical, electrical, computer, and materials engineering principles to the design of artificial limbs. Coverage includes the fundamentals of biomechanics, biomechanical modeling and measurements, the basics of anatomy and physiology of limb defects, and the historical development of prosthetic design. This book stimulates the innovative thinking necessary for advancing limb restoration, and will be essential reading for students, as well as researchers, professional engineers, and prosthetists involved in the design and manufacture of artificial limbs. Learning enhanced by the exercises, including physical modeling with MATLAB and Simulink; Includes appendices with relevant equations and parameters for reference; Introduction to the design and engineering of prosthetics and assistive technologies.
Book Synopsis Green Biocomposites by : Mohammad Jawaid
Download or read book Green Biocomposites written by Mohammad Jawaid and published by Springer. This book was released on 2017-02-11 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the concept, design and application of green biocomposites, with a specific focus on the current demand for green biocomposites for automotive and aerospace components. It discusses the mathematical background, innovative approaches to physical modelling, analysis and design techniques. Including numerous illustrations, tables, case studies and exercises, the text summarises current research in the field. It is a valuable reference resource for researchers, students and scientists working in the field of materials science.
Book Synopsis Textbook of Plastic and Reconstructive Surgery by : Deepak K. Kalaskar
Download or read book Textbook of Plastic and Reconstructive Surgery written by Deepak K. Kalaskar and published by UCL Press. This book was released on 2016-08-02 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts from London’s renowned Royal Free Hospital, Textbook of Plastic and Reconstructive Surgery offers a comprehensive overview of the vast topic of reconstructive plastic surgery and its various subspecialties for introductory plastic surgery and surgical science courses. The book comprises five sections covering the fundamental principles of plastic surgery, cancer, burns and trauma, paediatric plastic surgery and aesthetic surgery, and covers the breadth of knowledge that students need to further their career in this exciting field. Additional coverage of areas in which reconstructive surgery techniques are called upon includes abdominal wall reconstruction, ear reconstruction and genital reconstruction. A chapter on aesthetic surgery includes facial aesthetic surgery and blepharoplasty, aesthetic breast surgery, body contouring and the evolution of hair transplantation.The broad scope of this volume and attention to often neglected specialisms such as military plastic surgery make this a unique contribution to the field. Heavily illustrated throughout, Textbook of Plastic and Reconstructive Surgery is essential reading for anyone interested in furthering their knowledge of this exciting field. This book was produced as part of JISC's Institution as e-Textbook Publisher project. Find out more at https://www.jisc.ac.uk/rd/projects/institution-as-e-textbook-publisher
Book Synopsis Fundamentals of Amputation Care and Prosthetics by : Douglas Murphy, MD
Download or read book Fundamentals of Amputation Care and Prosthetics written by Douglas Murphy, MD and published by Demos Medical Publishing. This book was released on 2013-08-28 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experienced physiatrists, prosthetists, and therapists, this book provides an introduction to the field of amputee care and prosthetics. Dedicated chapters guide you through prescription of prostheses for the various levels and types of amputations in both the lower and upper extremity and address recent advances in functionality and safety. Pre- and post-operative care, prosthetic troubleshooting, gait issues and medical management of the residual limb are also addressed. With concise key information highlighted throughout, this handbook is a welcome point of care resource or study tool for trainees and practitioners in any field who work with amputees to restore function and help enrich the lives of these individuals. Fundamentals of Amputation Care and Prosthetics features: Concise, practical manual; covers the basics of upper and lower extremity amputee care and prosthetics Succinct presentation, well-illustrated; information is easy to find Portable; perfect for use on rounds or in the clinic State-of-the-art distillation of current thinking and practice; excellent transitional book for residents or ready reference for experienced practitioners
Book Synopsis Partial foot amputations by : Bengt Söderberg
Download or read book Partial foot amputations written by Bengt Söderberg and published by . This book was released on 2001 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
