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Keywords: conjugate gradient methods
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Journal Articles
Article Type: Research Papers
J. Tribol. October 2011, 133(4): 041404.
Published Online: October 14, 2011
... based on the robust Conjugate Gradient method and Fast Fourier transform has been developed to solve the normal approach, contact pressure, and real contact area simultaneously. The transient contact analysis in the time domain is computationally expensive. The fast Fourier transform algorithm can help...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2011, 133(3): 031401.
Published Online: June 21, 2011
... analytical relations between a unit stress and corresponding displacements or stresses were obtained through the use of the Papkovich–Neuber potentials. Conjugate gradient method (CGM) and fast Fourier transform (FFT) technique were employed to increase the solution speed. The algorithm was very effective...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2011, 133(2): 021702.
Published Online: March 18, 2011
... compressible flow computational fluid dynamics conjugate gradient methods differential equations Newton method Reynolds equation air bearing gas bearing iterative method Simulation of an air- or gas-lubricated bearing requires the solution of compressible-fluid Reynolds equation. Due...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2010, 132(2): 021403.
Published Online: March 11, 2010
... for calculating the displacements and stresses were determined in the frequency domain by using the Papkovich–Neuber potentials. The partial slip contact problem was solved by a numerical procedure based on the conjugate Gradient method and fast Fourier transform technique. The contact pressure, surface shear...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2008, 130(4): 041402.
Published Online: August 6, 2008
... for counterformal bodies has been developed, which takes into account steady state heat flux, temperature-dependent strain hardening behavior, and interaction of mechanical and thermal loads. The fast Fourier transform and conjugate gradient method are the underlying numerical algorithms used in this model. Sliding...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2007, 129(4): 791–800.
Published Online: June 7, 2007
... on an integral formulation or semi-analytical method. The application of both the conjugate gradient method and the discrete convolution and fast Fourier transform technique allows keeping the computing time reasonable when performing transient 3D simulations while solving the contact problem and calculating...
Journal Articles
Article Type: Technical Papers
J. Tribol. October 2007, 129(4): 761–771.
Published Online: May 24, 2007
... (FFT) and conjugate gradient methods. The FFT technique is also involved in the calculation of internal strains and stresses. A return-mapping algorithm with an elastic predictor∕plastic corrector scheme and a von Mises criterion is used in the plasticity loop. The model is first validated...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2007, 129(2): 235–245.
Published Online: November 27, 2006
... or displacement-driven (dd). Both formulations use the conjugate gradient method and the discrete convolution and fast Fourier transform (DC-FFT) technique. A validation of the code is made in the case of the displacement-driven formulation for an elastic-plastic body in contact with a rigid punch, simulating...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2006, 128(3): 476–485.
Published Online: March 1, 2006
... contact slip elasticity conjugate gradient methods fast Fourier transforms surface structure 08 06 2005 01 03 2006 Consequence of the misalignment on the wear distribution (simulation 4) Simulation 4: Effect of an offset of the center of pressure Simulation 4...
Journal Articles
Article Type: Article
J. Tribol. April 2005, 127(2): 387–393.
Published Online: April 7, 2005
...Pyung Hwang, Professor; Polina V. Khan, Graduate student The objective of the present work is to present the numerical analysis of the computer hard disk slider. The air film pressure is calculated using the finite element method. The conjugate-gradient method and the perturbation method...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2004, 126(3): 519–526.
Published Online: June 28, 2004
... conditions and load demands. The direct problem solver is then incorporated with the conjugate gradient method so as to develop an inverse method for the slider surface shape design. The specified load demands considered in this study are categorized into two kinds: (1) specified pressure distribution within...