Wave dislocation line threaded polarization interferometer

2021 ◽  
Author(s):  
Nirmal Viswanathan ◽  
Anagha Sreedharan
Keyword(s):  
Dislocation Line ◽  
Polarization Interferometer

Quantitative analysis of in situ straining experiments in the case of strong frictional forces

1978 ◽  
Vol 36 (1) ◽  
pp. 570-571
Author(s):  
F. Louchet ◽  
L.P. Kubin
Keyword(s):  
Strain Rate ◽  
Radiation Effects ◽  
Dislocation Line ◽  
Critical Length ◽  
Local Strain ◽  
Local Flow ◽  
Double Kink ◽  
Dislocation Densities ◽  
Frictional Forces ◽  
Local Strain Rate

Investigation of frictional forces -Experimental techniques and working conditions in the high voltage electron microscope have already been described (1). Care has been taken in order to minimize both surface and radiation effects under deformation conditions.Dislocation densities and velocities are measured on the records of the deformation. It can be noticed that mobile dislocation densities can be far below the total dislocation density in the operative system. The local strain-rate can be deduced from these measurements. The local flow stresses are deduced from the curvature radii of the dislocations when the local strain-rate reaches the values of ∿ 10-4 s-1.For a straight screw segment of length L moving by double-kink nucleation between two pinning points, the velocity is :where ΔG(τ) is the activation energy and lc the critical length for double-kink nucleation. The term L/lc takes into account the number of simultaneous attempts for double-kink nucleation on the dislocation line.

Cylindrically Anisotropic Tubes Containing a Line Dislocation

2006 ◽  
Author(s):  
Chung-Hao Wang
Keyword(s):  
State Space ◽  
Dislocation Line ◽  
Longitudinal Axis ◽  
The State ◽  
Fourier Series Expansion ◽  
General Solutions ◽  
Mixed Dislocation ◽  
Line Dislocation ◽  
Space Formulation ◽  
Cylindrically Anisotropic

An analytical solution of the problem of a cylindrically anisotropic tube which contains a line dislocation is presented in this study. The state space formulation in conjunction with the eigenstrain theory is proved to be a feasible and systematic methodology to analyze a tube with the existence of dislocations. The state space formulation which expediently groups the displacements and the cylindrical surface traction can construct a governing differential matrix equation. By using Fourier series expansion and the well developed theory of matrix algebra, the asymmetrical solutions are not only explicit but also compact in form. The dislocation considered in this study is a kind of mixed dislocation which is the combination of edge dislocations and a screw dislocation and the dislocation line is parallel to the longitudinal axis of the tube. The degeneracy of the eigen relation and the technique to determine the inverse of a singular matrix are thoroughly discussed, so that the general solutions can be applied to the case of isotropic tubes, which is one of the novel features of this research. The results of isotropic problems, which are belong to the general solutions, are compared with the well-established expressions in the literature. The satisfied correspondences of these comparisons indicate the validness of this study. A cylindrically orthotropic tube is also investigated as an example and the numerical results for the displacements and tangential stress on the outer surface are displayed. The effects on surface stresses due to the existence of a dislocation appear to have a characteristic of localized phenomenon.

Determination of shock wave velocity from photographs obtained using a polarization interferometer

1984 ◽  
Vol 16 (4) ◽  
pp. 199-202
Author(s):  
V.A. Komissaruk ◽  
N.P. Mende
Keyword(s):  
Shock Wave ◽  
Wave Velocity ◽  
Shock Wave Velocity ◽  
Polarization Interferometer

scholarly journals Transtrapezial Peritrapezoidal Transcapital Axial Radial Fracture Dislocation of the Carpus

Hand ◽  
2009 ◽  
Vol 4 (3) ◽  
pp. 319-322 ◽  
Author(s):  
Jürg Häcki ◽  
Ladislav Nagy ◽  
Andreas Schweizer
Keyword(s):  
Internal Fixation ◽  
Range Of Motion ◽  
Open Reduction ◽  
Dislocation Line ◽  
Fracture Dislocation ◽  
Radial Fracture ◽  
Unique Pattern

We report a unique pattern of an axial radial fracture dislocation of the carpus. The fracture dislocation line runs transtrapezial peritrapezoidal transcapital transmetacarpal III/IV. Open reduction and internal fixation was performed 11 days after the accident. The result at 9 months is moderate, with a range of motion of 63% and strength of 46% compared to the opposite side.

Measurement of the Differential Pockels and Kerr Coefficients of Thin Films by a Two-Beam Polarization Interferometer with a Reflection Configuration

2002 ◽  
Vol 271 (1) ◽  
pp. 321-326
Author(s):  
V. V. Spirin ◽  
F. J. Mendieta ◽  
Kwangsoo No
Keyword(s):  
Thin Films ◽  
Beam Polarization ◽  
Polarization Interferometer ◽  
Reflection Configuration
Sign in / Sign up

Export Citation Format

Share Document