Results 11 to 20 of about 479,852 (230)

Predicting dislocation climb: Classical modeling versus atomistic simulations [PDF]

, 2011
The classical modeling of dislocation climb based on a continuous description of vacancy diffusion is compared to recent atomistic simulations of dislocation climb in body-centered cubic iron under vacancy supersaturation [Phys. Rev. Lett.
D. Caillard, Emmanuel Clouet, F. R. N. Nabarro, J. Friedel, J. P. Hirth, J. Weertman, J. Weertman, S. Karashima, V. L. Indenbom   +8 more
core   +3 more sources

Quantized dislocations [PDF]

Journal of Physics: Condensed Matter, 2019
A dislocation, just like a phonon, is a type of atomic lattice displacement but subject to an extra topological constraint. However, unlike the phonon which has been quantized for decades, the dislocation has long remained classical. This article is a comprehensive review of the recent progress on quantized dislocations, aka the "dislon" theory.
openaire   +4 more sources

The gauge theory of dislocations: a nonuniformly moving screw dislocation

, 2010
We investigate the nonuniform motion of a straight screw dislocation in infinite media in the framework of the translational gauge theory of dislocations. The equations of motion are derived for an arbitrary moving screw dislocation.
Askes, Askes, Barton, Bopp, Brock, Edelen, Eringen, Eringen, Eshelby, Eshelby, Günther, Iwanenko, Kadić, Kiusalaas, Kiusalaas, Lardner, Lazar, Lazar, Lazar, Lazar, Markenscoff, Markenscoff, Markus Lazar, Mindlin, Mindlin, Mura, Mura, Nabarro, Podolsky, Rubakov, Wladimirow   +30 more
core   +1 more source

Dislocation core properties of \beta-tin: A first-principles study

, 2017
Dislocation core properties of tin (\beta-Sn) were investigated using the semi-discrete variational Peierls-Nabarro model (SVPN). The SVPN model, which connects the continuum elasticity treatment of the long-range strain field around a dislocation with ...
Adlakha, I., Azarnoush, M., Bhatia, M. A., Lu, G., Solanki, K. N.   +4 more
core   +1 more source

Edge dislocations in crystal structures considered as traveling waves of discrete models [PDF]

, 2003
The static stress needed to depin a 2D edge dislocation, the lower dynamic stress needed to keep it moving, its velocity and displacement vector profile are calculated from first principles.
A. Carpio, A. I. Landau, A. I. Landau, D. Hull, F. R. N. Nabarro, J. P. Hirth, L. L. Bonilla, L. B. Freund, L. D. Landau, N. G. van Kampen   +9 more
core   +3 more sources

Hydrogen-enhanced local plasticity in aluminum: an ab initio study

, 2001
Dislocation core properties of Al with and without H impurities are studied using the Peierls-Nabarro model with parameters determined by ab initio calculations.
C. D. Beachem, D. G. Ulmer, D. P. Abraham, D. Vanderbilt, Efthimios Kaxiras, G. Lu, G. Lu, Gang Lu, H. K. Birnbaum, J. E. Angelo, J. P. Perdew, J. R. Rice, M. J. Mills, M. S. Daw, M. S. Duesbery, Nicholas Kioussis, P. J. Ferreira, P. J. Ferreira, P. Sofronis, Qing Zhang, S. M. Myers, S. P. Lynch, T. Matsumoto, V. V. Bulatov, V. V. Bulatov   +24 more
core   +1 more source

Stress State Required for Pyramidal Dislocation Movement in Zinc [PDF]

, 1968
A tension or compression stress in such a direction that basal slip is minimized can produce second-order pyramidal slip bands in zinc single crystals. The stress required to initiate pyramidal dislocation motion is not sensitive to temperature. However,
Blish, R. C., II, Vreeland, T., Jr.
core   +1 more source

Dislocation nucleation and vacancy formation during high-speed deformation of fcc metals

, 2001
Recently, a dislocation free deformation mechanism was proposed by Kiritani et al., based on a series of experiments where thin foils of fcc metals were deformed at very high strain rates.
Leffers, T., Schiøtz, J., Singh, B. N.
core   +1 more source

STAT3 expression is reduced in cardiac pericytes in HFpEF and its loss reduces cellular adhesion and induces pericyte senescence

FEBS Letters, EarlyView.
Heart failure with preserved ejection fraction (HFpEF) accounts for half of the heart failure cases. It is characterised by microvascular dysfunction, associated with reduced pericyte coverage and diminished STAT3 expression in pericytes. Loss of STAT3 impairs pericyte adhesion, promotes senescence, and activates a pro‐fibrotic gene program.
Leah Rebecca Vanicek, Ariane Fischer, Mariano Ruz Jurado, Anita Tamiato, Tara Procida‐Kowalski, Jochen Wilhelm, Dennis Hecker, Maximilian Merten, Felicitas Escher, Badder Kattih, Valentina Puntmann, David John, Marcel H. Schulz, Eike Nagel, Stefanie Dimmeler, Guillermo Luxán   +15 more
wiley   +1 more source

Lunate dislocation

Journal of the Belgian Society of Radiology, 2014
A 38 year-old patient was admitted to the emergency department after road accident due to pain on palpation of the right wrist, the 1st and the 2nd finger of the right hand. The patient was subsequently referred for an X-ray. Following the proper positioning of the patient and the systematic analysis of the wrist X-ray (PA and lateral view), a lunate ...
Filippitzi, Fotini, Dallaudière, Benjamin, Omoumi, Patrick, Lecouvet, Frédéric, Lefere, Mathieu, Vande Berg, Bruno, Larbi, Ahmed   +6 more
openaire   +6 more sources