This note summarizes recent progress in developing h-p adaptive finite element methods for the numerical solution of the Navier-Stokes equations. A brief review of the h-p strategies and...
Uses of the hp-Version of the Finite Element Method for Ensuring the Reliability of Engineering Data
There is a growing interest in ensuring the reliability and accuracy of engineering data computed by the finite element method. Various adaptive and feedback schemes, which involve the...
The Weighted Integral Method for Calculating the Stochastic Stiffness Matrix of Stochastic Systems
This paper introduces the 'weighted integral method' for calculating an exact expression of the stochastic stiffness matrix of a stochastic structure. Using this...
Axial Force-Moment Interaction in System Reliability
For rigid-plastic structures with random resistances and loads, a technique is presented that identifies critical failure modes considering the effect of axial force-moment interaction...
An Adaptive Importance Sampling Strategy
An adaptive importance sampling scheme is presented. The scheme updates both the estimate of system failure probability and the importance sampling density. The sampling density used is...
Response Variability and Reliability of Stochastic Systems Using the Weighted Integral Method
After obtaining an exact expression of the stochastic stiffness matrix in terms of random variables called weighted integrals, the response variability and the safety index of stochastic...
Biomechanical Model of a Lumbar Intervertebral Joint?A System Approach
This study was conducted to determine the forces sustained by the lumbar ligaments under flexion-compression using a two-dimensional equilibrium model. The lumbar motion segment was modeled...
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 Two-Dimensional Model of Airbag Deployment
An interactive program was developed to simulate the unfolding and deploying process of a driver side airbag in the sagittal plane. The airbag was represented by a series of nodes. We...
Using a Linearized Yield Surface in Dynamic Analysis
This paper describes an application of the finite element method to dynamic analysis of systems which exhibit material nonlinearity. A time history approach is used with a central difference...
The Analysis of a Spherical Shell
The analysis of a spherical shell may be performed by using the integral equation method. For a continuum structure, this method is computationally efficient and requires simple input...
Engineering Applications of the Analysis of a Spherical Shell
In a companion paper, a set of two integral equations have been established for a spherical shell under axisymmetric loads. This set of equations may be solved numerically by using Nystrom...
Time-Delayed Control of Nondispersive Continuous Systems
This paper deals with the noncollocated, time-delayed active point control of continuous systems. It considers systems of finite spatial extent which can be modelled by the undamped wave...
Spatial Coherence in the Chaotic Dynamics of Multi-Degree-of-Freedom Elastic Impact Oscillators
In this paper, we describe a method for estimating the number of degrees of freedom needed to adequately model nonlinear structural systems. We apply the method to the study of chaotic...
Experimental and Numerical Chaos in Continuous Systems: Two Case Studies
Motivated by recent numerical investigations according to which certain types of deep-water compliant offshore structures may experience undesirable chaotic motions, two types of experimental...
Adequacy of Statistical Linearization for Nonlinear Degrading Structural Systems
An investigation is carried out to examine the validity of current practice in using statistical linearization method for nonlinear degrading structures subject to random ground acceleration....
Stability Analysis of Nonlinear Frames
The second stiffness method for large deformation in-elastic stability analysis of frames is discussed. Displacement control methods for tracing the path beyond the limit point are presented....
Characterization of Acoustic Emission Signals
Separation of crack growth signals is of fundamental importance for detecting, locating and determining the significance of an internal flaw using acoustic emission techniques. An analytical...
Damage Tolerance of Composites
The damage tolerance issue in composites is driven by the requirement for and implementation of a structural integrity criterion for a structural system. A key element in the design philosophy...
Experimental Techniques to Study the Microstructure of Cement-Based Materials
Techniques to identify phases and changes in microstructure within cement paste, mortar, and concrete using a scanning electron microscope and image analysis system are described. Backscattered...
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