scholarly journals Modeling the elastic strain fields by point-source method

2015 ◽  
Vol 15 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Sergey Knyazev ◽  
Elena Shcherbakova ◽  
Viktor Pustovoyt
Keyword(s):  
Point Source ◽  
Elastic Strain ◽  
Strain Fields ◽  
Source Method

scholarly journals Modeling of three-dimensional elastic strain fields by point-source method

2015 ◽  
Vol 15 (4) ◽  
pp. 13-23 ◽  
Author(s):  
Sergey Knyazev ◽  
Elena Shcherbakova ◽  
Viktor Pustovoyt ◽  
Anton- Shcherbakov-
Keyword(s):  
Point Source ◽  
Elastic Strain ◽  
Three Dimensional ◽  
Strain Fields ◽  
Source Method

Ultrasonic Field Modeling in Multilayered Fluid Structures Using the Distributed Point Source Method Technique

2005 ◽  
Vol 73 (4) ◽  
pp. 598-609 ◽  
Author(s):  
Sourav Banerjee ◽  
Tribikram Kundu ◽  
Dominique Placko
Keyword(s):  
Point Source ◽  
Ultrasonic Field ◽  
Ultrasonic Transducers ◽  
Analytical Technique ◽  
Source Method ◽  
Fluid Systems ◽  
First Case ◽  
Fluid Layers ◽  
Distributed Point Source Method ◽  
Nonhomogeneous Fluids

In the field of nondestructive evaluation (NDE), the newly developed distributed point source method (DPSM) is gradually gaining popularity. DPSM is a semi-analytical technique used to calculate the ultrasonic field (pressure and velocity fields) generated by ultrasonic transducers. This technique is extended in this paper to model the ultrasonic field generated in multilayered nonhomogeneous fluid systems when the ultrasonic transducers are placed on both sides of the layered fluid structure. Two different cases have been analyzed. In the first case, three layers of nonhomogeneous fluids constitute the problem geometry; the higher density fluid is sandwiched between two identical fluid half-spaces. In the second case, four layers of nonhomogeneous fluids have been considered with the fluid density monotonically increasing from the bottom to the top layer. In both cases, analyses have been carried out for two different frequencies of excitation with various orientations of the transducers. As expected, the results show that the ultrasonic field is very sensitive to the fluid properties, the orientation of the fluid layers, and the frequency of excitation. The interaction effect between the transducers is also visible in the computed results. In the pictorial view of the resulting ultrasonic field, the interface between two fluid layers can easily be seen.

J-Integral Analysis of the Elastic Strain Fields of Ferrite Deformation Twins using Electron Backscatter Diffraction

2021 ◽  
pp. 117203
Author(s):  
Abdalrhaman Koko ◽  
Elsiddig Elmukashfi ◽  
Kalin Dragnevski ◽  
Angus J. Wilkinson ◽  
Thomas James Marrow
Keyword(s):  
Elastic Strain ◽  
Electron Backscatter Diffraction ◽  
J Integral ◽  
Strain Fields ◽  
Integral Analysis ◽  
Deformation Twins ◽  
Electron Backscatter ◽  
Backscatter Diffraction

Distributed Point Source Method for CNDE

2020 ◽  
pp. 269-398
Author(s):  
Sourav Banerjee ◽  
Cara A.C. Leckey
Keyword(s):  
Point Source ◽  
Source Method ◽  
Distributed Point Source Method

scholarly journals Numerical solution to boundary problems for Poisson’s equation by point-source method

10.12737/4543 ◽  
2014 ◽  
Vol 14 (2) ◽  
Author(s):  
Sergey Knyazev ◽  
Elena Shcherbakova ◽  
Alyosha Engibaryan
Keyword(s):  
Point Source ◽  
Numerical Solution ◽  
Poisson’S Equation ◽  
Poisson's Equation ◽  
Boundary Problems ◽  
Source Method

A point-source method in inverse acoustic scattering

1998 ◽  
pp. 171-175
Author(s):  
Roland Potthast
Keyword(s):  
Point Source ◽  
Acoustic Scattering ◽  
Source Method

On: “Correction of topographic distortions in potential‐field data: A fast and accurate approach” by Jianghai Xia, Donald R. Sprowl, and Dana Adkins‐Heljeson (April 1993 GEOPHYSICS, p. 515–523).

Geophysics ◽  
1993 ◽  
Vol 58 (12) ◽  
pp. 1874-1874
Author(s):  
David A. Chapin
Keyword(s):  
Point Source ◽  
Frequency Domain ◽  
Potential Field ◽  
Field Data ◽  
New Method ◽  
Potential Fields ◽  
Potential Field Data ◽  
Source Method ◽  
Equivalent Point ◽  
Breakthrough Technology

Xia et al. do an excellent job developing a new method for using the equivalent point source method in the frequency domain. The transformation from a varying datum to flat datum has always been a major problem in potential fields data. This is because the existing methods to perform this transformation have tended to be cumbersome, time‐consuming, and expensive. I congratulate the authors for this breakthrough technology.

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