scholarly journals A Methodology to Validate the InSAR Derived Displacement Field of the September 7th, 1999 Athens Earthquake Using Terrestrial Surveying. Improvement of the Assessed Deformation Field by Interferometric Stacking

Sensors ◽  
2008 ◽  
Vol 8 (7) ◽  
pp. 4119-4134 ◽  
Author(s):  
Ioannis Kotsis ◽  
Charalabos Kontoes ◽  
Dimitrios Paradissis ◽  
Spyros Karamitsos ◽  
Panagiotis Elias ◽  
...  
Keyword(s):  
Displacement Field ◽  
Deformation Field ◽  
Athens Earthquake

3D Simulation of Foundation Excavation in a Subway Station

2012 ◽  
Vol 468-471 ◽  
pp. 781-784
Author(s):  
Jin Lu ◽  
Xiao Fan Liao
Keyword(s):  
Displacement Field ◽  
Three Dimensional ◽  
Deformation Field ◽  
Subway Station ◽  
Failure Zone ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
The Status ◽  
Practical Engineering ◽  
Variation Characteristics

According to an practical construction of an subway station, the foundation excavation three dimensional model was built by FLAC3D from the need of practical engineering. The status and variation characteristics of the displacement field, deformation field and plastic failure zone were obtained. Guiding significance was provided by the simulation.

scholarly journals Elastic Properties of Statistically Equivalent Materials With Varying Individual Grain Orientations

1995 ◽  
Vol 25 (1) ◽  
pp. 17-24 ◽  
Author(s):  
H. Kiewel ◽  
H. J. Bunge ◽  
L. Fritsche
Keyword(s):  
Elastic Properties ◽  
Displacement Field ◽  
Elastic Moduli ◽  
Local Deformation ◽  
Deformation Field ◽  
Copper Metal ◽  
Bcc Lattice ◽  
Real Material ◽  
Different Types ◽  
Grain Orientations

The elastic properties of copper metal with different individual grain orientations exhibiting the same texture are determined. We simulate the real material by two different types of clusters. The first one consists of 365 cubic grains, the second cluster is an arrangement of 181 Wigner-Seitz cells of a body centred cubic (bcc)-lattice. For each type of cluster we let the local grain orientations vary. The displacement field inside these aggregates as a result of a homogeneous deformation acting on the surface of the clusters is calculated. Although the resulting local deformation field for different individual grain orientations varies strongly, the macroscopic elastic moduli are in the frame of this simulation identical for any cluster of the same type, as it has to be for statistically equivalent materials.

scholarly journals Displacement field and fault model for the September 7, 1999 Athens Earthquake inferred from ERS2 Satellite radar interferometry

2000 ◽  
Vol 27 (24) ◽  
pp. 3989-3992 ◽  
Author(s):  
C. Kontoes ◽  
P. Elias ◽  
O. Sykioti ◽  
P. Briole ◽  
D. Remy ◽  
...  
Keyword(s):  
Displacement Field ◽  
Fault Model ◽  
Radar Interferometry ◽  
Athens Earthquake ◽  
Satellite Radar

The Analysis of Dislocations Using a Symmetry Criterion

1972 ◽  
Vol 30 ◽  
pp. 660-661
Author(s):  
J. C. Ingram ◽  
P. R. Strutt ◽  
Wen-Shian Tzeng
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Displacement Field ◽  
Standard Technique ◽  
Residual Image ◽  
Symmetry Criterion

The invisibility criterion which is the standard technique for determining the nature of dislocations seen in the electron microscope can at times lead to erroneous results or at best cause confusion in many cases since the dislocation can still show a residual image if the term is non-zero, or if the edge and screw displacements are anisotropically coupled, or if the dislocation has a mixed character. The symmetry criterion discussed below can be used in conjunction with and in some cases supersede the invisibility criterion for obtaining a valid determination of the nature of the dislocation.The symmetry criterion is based upon the well-known fact that a dislocation, because of the symmetric nature of its displacement field, can show a symmetric image when the dislocation is correctly oriented with respect to the electron beam.

scholarly journals Direct observation of the displacement field and microcracking in a glass by means of X-ray tomography during in situ Vickers indentation experiment

2019 ◽  
Vol 179 ◽  
pp. 424-433 ◽  
Author(s):  
Tanguy Lacondemine ◽  
Julien Réthoré ◽  
Éric Maire ◽  
Fabrice Célarié ◽  
Patrick Houizot ◽  
...  
Keyword(s):  
Direct Observation ◽  
Displacement Field ◽  
Vickers Indentation ◽  
X Ray ◽  
Indentation Experiment

Simulation of multiwavelength conditions in laser picosecond ultrasonics

SIMULATION ◽  
2021 ◽  
pp. 003754972199645
Author(s):  
Philippe Babilotte
Keyword(s):  
Numerical Simulations ◽  
Acoustic Signal ◽  
Acoustic Waves ◽  
Bulk Material ◽  
Deformation Field ◽  
Optical Pump ◽  
Pump And Probe ◽  
Oriented Object ◽  
Numerical Approaches ◽  
Picosecond Ultrasonics

Complete numerical simulations are given under SciLab® and MATLAB® coding environments, concerning propagative acoustic wavefronts, for laser picosecond ultrasonics under multiwavelength conditions. Simulations of the deformation field and its propagation into bulk material are given under different wavelength configurations for optical pump and probe beams, which are used to generate and to detect the acoustic signal. Complete insights concerning the dynamics of the acoustic waves are given, considering the absence of carrier diffusions into the material. Several numerical approaches are proposed concerning both the functions introduced to simulate the wavefront ( Heaviside or error) and the coding approach (linear/vectorized/ Oriented Object Programming), under the pure thermo-elastic approach.

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