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Book Finite Element Analysis of the Femoral Head

Download or read book Finite Element Analysis of the Femoral Head written by Ghandikota Ramamurthy and published by . This book was released on 1983 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Femoral component loosening and Prosthetic stem fractures have renewed interest in conservative alternatives to conventional total hip replacements. One such alternative is the concept of surface replacement. The objective in this study is a finite element analysis of a femoral surface replacement cup with Particular attention given to the interfacial stresses. An axisymmetric model with a grid of two-dimensional isoparametric elements is generated. This study utilizes an adaptive model so as to include the effect of bone remodeling in response to stress. The stiffness is considered to be linearly proportional to the stress in the femoral head and neck. Isotropic properties are chosen. The stresses are determined by performing iterative finite element analyses based upon an appropriate variation of the stiffness property in each analysis until the results obtained are within the convergence limit. Plots of stress contours in the femoral head are obtained for the loads acting on the joint during walking.

Book Three dimensional Finite Element Analysis as a Tool to Study the Stress Distribution in the Natural and Prosthetic Proximal Tibia

Download or read book Three dimensional Finite Element Analysis as a Tool to Study the Stress Distribution in the Natural and Prosthetic Proximal Tibia written by Stephen H. Hoag and published by . This book was released on 1990 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Finite Element Analysis of Bone Remodeling Implementation of a Remodeling Algorithm in Matlab and Ansys

Download or read book Finite Element Analysis of Bone Remodeling Implementation of a Remodeling Algorithm in Matlab and Ansys written by Martin Groß and published by GRIN Verlag. This book was released on 2008-08 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2006 in the subject Medicine - Biomedical Engineering, grade: 1.0, Technical University of Munich (LS Statik), course: Master of Science of Computational Mechanics, 94 entries in the bibliography, language: English, abstract: The process of adaptive bone remodeling can be described mathematically and simulated in a computer model, integrated with the finite element method. The main focus of this thesis is the implementation of a bone remodeling algorithm in MATLAB and ANSYS on the basis of FEM. The strain energy density is used as mechanical stimulus. The cortical and trabecular bone are described as continuous materials with variable density. This thesis can be divided into four main parts. The first part is due to the material properties of cortical and trabecular bone. The second part is about the remodeling theory and gives an historical review of the developed numerical approaches up to now. The implementation of the remodeling algorithm in ANSYS and MATLAB as well as its validation is topic of part three. In last main part, the algorithm is applied to a 2D FE-model of a human proximal femur.

Book Three Dimensional Dynamic Hypoelastic Remodeling in the Proximal Femur

Download or read book Three Dimensional Dynamic Hypoelastic Remodeling in the Proximal Femur written by Charles Hugh Negus and published by . This book was released on 2005 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research effort in bone remodeling has been directed toward describing interstitial fluid flow in the lacuno-canalicular system and its potential as a cellular stimulus. Regardless of the precise contents of the mechanotransduction "black box", it seems clear that the fluid flow on which the remodeling is predicated can not occur under static loading conditions. In an attempt to help continuum remodeling simulations catch up with cellular and subcellular research, this research presents a simple but novel strain rate driven remodeling algorithm for density allocation and principal material direction rotations. An explicit finite element code was written, parallelized and deployed at the San Diego Supercomputer Center which implements the remodeling algorithm. Remodeling occurs at discrete, periodically occurring time steps. Cortical and trabecular apparent density are updated based on local strain rate, and realignment of principal material directions is driven by the local stress tensor. Stress is calculated using a path-dependent hypoelastic constitutive law, formulated with the Jaumann stress rate. The testbed for this algorithm is the proximal femur. Loading conditions were linearized around instants of peak rate of application during normal gait and stair climbing, assumed to occur with sufficient frequency to exceed the threshold cycle number for cellular remodeling activation. Results indicate that a target strain rate for this dynamic approach is #"special characters omitted]#"= 1.7%/sec which seems reasonable when compared to observed strain rates. The dynamic stimulus, hypoelastic constitutive law algorithm produces unique and convergent equilibrium predictions for remodeling parameters in the stable range. Remodeling simulations indicate that a morpho-mechanically realistic three dimensional bone can be synthesized by applying a few dynamic loads at the envelope of common daily physiological rates, even in the absence of a static loading component. This work constitutes the only known large-scale remodeling simulations of the proximal femur which includes the effects of both density changes and orthotropic realignment, and the first known remodeling simulation employing a dynamic remodeling stimulus. Macroscopic three dimensional analyses such as this may be of benefit to surgeons and clinicians seeking a greater understanding of the biomechanical effects of bone cysts, tumors, stress fracture, microgravity environments, and osteoporosis

Book Finite Element Method and Medical Imaging Techniques in Bone Biomechanics

Download or read book Finite Element Method and Medical Imaging Techniques in Bone Biomechanics written by Rabeb Ben Kahla and published by John Wiley & Sons. This book was released on 2020-01-02 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital models based on data from medical images have recently become widespread in the field of biomechanics. This book summarizes medical imaging techniques and processing procedures, both of which are necessary for creating bone models with finite element methods. Chapter 1 introduces the main principles and the application of the most commonly used medical imaging techniques. Chapter 2 describes the major methods and steps of medical image analysis and processing. Chapter 3 presents a brief review of recent studies on reconstructed finite element bone models, based on medical images. Finally, Chapter 4 reveals the digital results obtained for the main bone sites that have been targeted by finite element modeling in recent years.

Book A Three Dimensional Finite Element Stress Analysis in and Around the Screw Vent Implant

Download or read book A Three Dimensional Finite Element Stress Analysis in and Around the Screw Vent Implant written by Nancy L. Clelland and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Finite Element Head Injury Model Theory development and results

Download or read book A Finite Element Head Injury Model Theory development and results written by T. A. Shugar and published by . This book was released on 1977 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Three Dimensional Finite Element Analysis

Download or read book Three Dimensional Finite Element Analysis written by Perwez Obaid and published by . This book was released on 1972 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Advances in Bioengineering

Download or read book Advances in Bioengineering written by and published by . This book was released on 1981 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Three dimensional Finite Element Analysis of the Human Distal Femur

Download or read book Three dimensional Finite Element Analysis of the Human Distal Femur written by Louise Joly and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: