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In-Vitro Measurement of Static Contact Pressure Distribution in Synovial Joints
The objective of this presentation is, at first, to review the various approaches to the measurement of contact pressure distribution in synovial joints, and then to describe the development...

Biomechanics of Local Articular Incongruities
Abnormalities of intra-articular contact near sites of local surface incongruity are frequently associated with secondary osteoarthrosis. We here review a series of experimental and computational...

Normal and Tangential Contact of Layered Spheres as Models of Joint Contact
The causes of cracking in degenerating cartilage are examined using analytical models of layered elastic spheres in normal and tangential contact. Vertical surface and deep radial cracks...

A Contact Problem Modeling the Squeeze-Film Mode of Synovial Joint Lubrication
A contact problem modeling synovial joint lubrication under squeeze-film conditions is studied. In this model, the thin synovial fluid layer is incompressible and linearly viscous, and...

Dynanmic Stability and Seismic Response of Damped Beams in the Presence of Follower Forces
The dynamic stability and the seismic response of general beams are examined, by discretizing the structure to a set of rigid bars, linked together by means of elastic constraints (Cells...

Effects on Seismic Spatial Variations to Suspension Bridge Responses
The dynamic soil-structure interaction effects and spatial variations of a seismic motion seem to have significant contributions on the response evaluation of a long span suspension bridge....

Comparative Time Domain Analysis of Some Available Analytical and Empirical Expressions for the Spatial Variability of Seismic Ground Motions
Simulations in space and time based on models for the spatial variability of seismic ground motions are generated. Displacement time histories are simulated through the spectral representation...

Vibration of Plates with Corner Stress Singularities
A method of analysis is presented to determine the free vibration frequencies of plates having corner stress singularities. Displacements are assumed in the form of polynomials, and corner...

Curvature Effects on the Deflection and Vibration of Cross-Ply Shallow Shells
The use of high performance materials is becoming increasingly significant in structures subjected to severe loading conditions. Effects of curvature on the stiffness characteristics of...

On the Solution of Plates and Shells Mixed Boundary Problems
Strain-stress state analysis on plates and shells under mixed boundary conditions is of significant practical value: a lot of problems, arisen in machine design, civil engineering etc.,...

Finite Element Stability of Eccentrically Stiffened Plates
A finite element model is developed to investigate the elastic stability of eccentrically stiffened rectangular plates. The formulation is based on the behavior of the plate-stiffener...

Localized Collapse of Shells of Revolution
A local-global methodology is presented to treat the problems of localized collapse of shells of revolution. The strategy consists of employing two dimensional general shell elements in...

Thermal Effects in a Transient Study of Fracture
Studies, e.g. Zehnder and Rosakis (1989), indicate that fracture is associated with temperature rises in inelastic zones near the crack edge. To gain more insight into this phenomenon,...

Safe-Load-Limit of Plates in Cylindrical Bending
The derivation of a closed-form expression for the viscoelastic critical load of long thin plates undergoing cylindrical bending and made of a linear time-dependent 'solid'-type...

Design Considerations for Large-Scale Filament-Wound Composite Structures
An experimental investigation was conducted to quantify scaling effects in filament-wound composite structures. These preliminary results support the notion that an increase in thickness...

Frictionless Contact of Composite Laminates
An approximate solution technique for determination of contact stress distribution under a curved, rigid punch indenting an arbitrary laminated composite plate is outlined. The individual...

A Damping Model for the Vibration of Nonlinear Laminated Composite Cylindrical Panels with High Order Transverse Shears
The damping characteristics of nonlinear vibration of a cylindrical panel including large displacements/rotations and parabolic transverse shears has been discussed in this study. The...

Partial Hybrid Stress Element for Higher-Order Laminated Plates Theory
The partial hybrid stress method is applied to higher-order plate theory for orthotropic laminated plates. This new element performs better than displacement formulation and approaches...

Visualization of the Microstructural Response of Lightly-Cemented Granular Soils Under Uniaxial Strain Conditions
The microstructural response of granular soil under uniaxial strain is being investigated through direct observation of micromotions. Two techniques are being refined to quantify individual...

Development of a Constitutive Model for Impact Limiters
A constitutive model is being developed for 'impact limiter' materials such as aluminum honeycombs and polyurethane foams. Among other applications, these materials...

 

 

 

 

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