Download or read book Design of a compliant prosthetic socket fabricated using Selected Laser Sintering written by Sean David Stephens and published by . This book was released on 1999 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Development of a compliance model for a prosthetic socket fabricated using selective laser sintering written by Mahendra Bhagwat Lokhande and published by . This book was released on 2001 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Fabrication of Prosthetic Sockets Using Selective Laser Sintering written by Mario Carneiro Faustimi and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation and Design of an Actively Actuated Lower limb Prosthetic Socket written by John Thomas Montgomery and published by . This book was released on 2009 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: A prosthetic socket worn by an amputee must serve a wide variety of functions, from stationary support to the transfer of forces necessary to move. Fit and comfort are important factors in determining the therapeutic effectiveness of a socket. A socket that does not fit the subject well will cause movement problems and potentially long-term health issues. Because a subject's residual limb changes volume throughout the day, it is desirable that the socket adapt to accommodate volume changes to maintain fit and comfort. This thesis presents research to manufacture adaptive sockets using selective laser sintering (SLS). This additive manufacturing process allows freedom to design a socket that has both compliant areas that can adapt to changes to the residual limb, as well as rigid regions to provide necessary support for the limb. A variety of concepts are discussed that are intended for manufacture by SLS, and that feature flexible inner membranes in various configurations. For each concept the membrane will be inflated or deflated to match the limb's change in volume and the thesis also presents a study to determine SLS machine parameters for optimal build results. A series of experiments was created to understand the ability of SLS manufactured plastics to be inflated and the possible performance.

Download or read book Bending Strength Test and Evaluation of a Transtibial Prosthetic Socket Fabricated by Selective Laser Sintering written by Amanda Joyce Brooks and published by . This book was released on 2004 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Rehabilitation Research Development written by and published by . This book was released on 2005 with total page 1172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Rehabilitation R D written by and published by . This book was released on 2005 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design of compliant ankle orthoses for fabrication by selective laser sintering written by Nehal Sardar Rahim and published by . This book was released on 2000 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book High Value Manufacturing Advanced Research in Virtual and Rapid Prototyping written by Paulo Jorge da Silva Bartolo and published by CRC Press. This book was released on 2013-09-16 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Value Manufacturing is the result of the 6th International Conference on Advanced Research in Virtual and Rapid Prototyping, held in Leiria, Portugal, October 2013. It contains current contributions to the fi eld of virtual and rapid prototyping (V&RP) and is also focused on promoting better links between industry and academia. This volume comprises a collection of more than 110 reviewed papers which cover a wide range of topics, such as Additive and Nano Manufacturing Technologies, Biomanufacturing, Materials, Rapid Tooling and Manufacturing, CAD and 3D Data Acquisition Technologies, Simulation and Virtual Environments, and novel applications. High Value Manufacturing is intended for engineers, designers and manufacturers who are active in the fi elds of mechanical, industrial and biomedical engineering.

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 (

Download or read book DHM2020 written by L. Hanson and published by IOS Press. This book was released on 2020-09-11 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital human modeling (DHM) is an active field of research directed towards the goal of creating detailed digital models of the human body and its functions, as well as assessment methods for evaluating human interaction with products and production systems. These have many applications in ergonomics, design and engineering, in fields as diverse as the automotive industry and medicine. This book presents the proceedings of the 6th International Digital Human Modeling Symposium (DHM2020), held in Skövde, Sweden from 31 August to 2 September 2020. The conference was also accessible online for those unable to attend in person because of restrictions due to the Covid-19 pandemic. The symposium provides an international forum for researchers, developers and users to report their latest innovations, summarize new developments and experiences within the field, and exchange ideas, results and visions in all areas of DHM research and applications. The book contains the 43 papers accepted for presentation at the conference, and is divided into 6 sections which broadly reflect the topics covered: anthropometry; behavior and biomechanical modeling; human motion data collection and modeling; human-product interaction modeling; industry and user perspectives; and production planning and ergonomics evaluation. Providing a state-of-the-art overview of research and developments in digital human modeling, the book will be of interest to all those who are active in the field.

Download or read book Journal of Biomechanical Engineering written by and published by . This book was released on 2005 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Storage and Return Prosthetic Foot Design Using Selective Laser Sintering written by Brian James South and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Analysis of a Volume Adjustable Transtibial Prosthetic Socket for Pediatric Amputees in Developing Countries written by Meagan Renee Vaughan and published by . This book was released on 2010 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: For pediatric amputees in developing countries, where characteristically rapid growth of children is compounded by a lack of medical services, maintaining proper socket fit is a challenging but necessary endeavor. A socket design that adjusts for radial and longitudinal growth will allow patients to wear the same socket for a longer period of time saving them the expense of subsequent fittings and hardware. Manufacture of such a socket poses a challenge for contemporary manufacturing processes. Due to its ability to rapidly manufacture complex part geometries, Selective Laser Sintering (SLS) is particularly suited to this application. Several preliminary design concepts for a volume adjustable transtibial SLS prosthetic socket for pediatric amputees in developing countries have been generated. These current design concepts utilize fasteners such as ratchet hooks and threads. Results from design and validation of theoretical models of these fastener concepts are the focus of this thesis.

Download or read book Atlas of Amputations and Limb Deficiencies written by Joseph Ivan Krajbich and published by Lippincott Williams & Wilkins. This book was released on 2023-08-29 with total page 2869 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in one convenient volume, Atlas of Amputations and Limb Deficiencies: Surgical, Prosthetic, and Rehabilitation Principles, Fifth Edition, remains the definitive reference on the surgical and prosthetic management of acquired and congenital limb loss. Developed in partnership with the American Academy of Orthopaedic Surgeons (AAOS) and edited by Joseph Ivan Krajbich, MD, FRCS(C), Michael S. Pinzur, MD, FAAOS, COL Benjamin K. Potter, MD, FAAOS, FACS, and Phillip M. Stevens, MEd, CPO, FAAOP, it discusses the most recent advances and future developments in prosthetic technology with in-depth treatment and management recommendations for adult and pediatric conditions. With coverage of every aspect of this complex field from recognized experts in amputation surgery, rehabilitation, and prosthetics, it is an invaluable resource for surgeons, physicians, prosthetists, physiatrists, therapists, and all others with an interest in this field.