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RISFinite Element Stress Analysis of a Push-Out Test Part 1: Fixed Interface Using Stress Compatible Elements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this first part of a two-part paper, interelement stress compatible finite elements are developed and used to perform the stress analysis of a push-out test with a fixed interface. In the ...
Analysis of Role of Bone Compliance on Mechanics of a Lumbar Motion Segment
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A large deformation elasto-static finite element formulation is developed and used for the determination of the role of bone compliance in mechanics of a lumbar motion segment. This is done ...
Finite Element Stress Analysis of a Push-Out Test Part II: Free Interface With Nonlinear Friction Properties
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this second part of a two-part paper, nonlinear frictional properties measured at the bone/porous-surfaced metal interface are used to perform the stress analysis of a push-out test assuming ...
Stabilizing Role of Moments and Pelvic Rotation on the Human Spine in Compression
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The mechanisms by which the human spinal column in neutral postures can resist relatively large axial compression forces with no abnormal motions or instabilities remain yet unknown. A nonlinear ...
Nonlinear Gross Response Analysis of a Lumbar Motion Segment in Combined Sagittal Loadings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A 3-D nonlinear mathematical model is used to analyze the mechanical response of a lumbar L2–3 motion segment including the posterior elements when subjected to combined sagittal plane loads. ...
A Fibril-Network-Reinforced Biphasic Model of Cartilage in Unconfined Compression
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Cartilage mechanical function relies on a composite structure of a collagen fibrillar network entrapping a proteoglycan matrix. Previous biphasic or poroelastic models of this tissue, which have ...
Analysis of Nonlinear Coupled Diffusion of Oxygen and Lactic Acid in Intervertebral Discs
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The transport of oxygen and lactate (i.e., lactic acid) in the human intervertebral disc was investigated accounting for the measured coupling between species via the pH level in the tissue. ...
The Asymmetry of Transient Response in Compression Versus Release for Cartilage in Unconfined Compression
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Observations in compression tests of articular cartilage have revealed unequal load increments for compression and release of the same amplitude applied to a disk with an identical previously ...
Experimental and Finite Element Comparison of Various Fixation Designs in Combined Loads
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The short- and long-term successes of tibial cementless implants depend on the initial fixation stability often provided by posts and screws. In this work, a metallic plate was fixed to a ...
Strain-rate Dependent Stiffness of Articular Cartilage in Unconfined Compression
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The stiffness of articular cartilage is a nonlinear function of the strain amplitude and strain rate as well as the loading history, as a consequence of the flow of interstitial water and ...