Results 61 to 70 of about 2,237,184 (349)

Velocity-dependent quantum phase slips in 1D atomic superfluids [PDF]

Scientific Reports, 2016
AbstractQuantum phase slips are the primary excitations in one-dimensional superfluids and superconductors at low temperatures but their existence in ultracold quantum gases has not been demonstrated yet. We now study experimentally the nucleation rate of phase slips in one-dimensional superfluids realized with ultracold quantum gases, flowing along a ...
Tanzi Luca, Abbate Simona Scaffidi, Cataldini Federica, Gori Lorenzo, Lucioni Eleonora, Inguscio Massimo, Modugno Giovanni, D'Errico Chiara   +7 more
openaire   +6 more sources

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

The Exponentially Faster Stick-Slip Dynamics of the Peeling of an Adhesive Tape

, 2014
The stick-slip dynamics is considered from the nonlinear differential-algebraic equation (DAE) point of view and the peeling dynamics is shown to be a switching differential index DAE model.
Mishra, Nachiketa, Parida, Nigam Chandra, Raha, Soumyendu   +2 more
core   +1 more source

Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
Single‐grain scratching of Ti–6Al–4V is investigated under controlled, oxygen‐free, and ambient atmospheres using a novel experimental setup with in situ high‐speed imaging. The approach enables direct observation of chip formation and adhesion under suppressed oxidation.
Berend Denkena, Benjamin Bergmann, Michael Zenger   +2 more
wiley   +1 more source

Analytical Solutions for Unsteady Pipe Flows with Slip Boundary Condition

Journal of Applied Fluid Mechanics, 2020
In this paper analytical expressions for time-dependent velocity profiles and pressure gradient are obtained for fully-developed laminar flows with given volume flow-rate conditions in circular pipe flows with slip boundary conditions.
Anek. V. Pillai, K. V. Manu
doaj  

Transportation of thermal and velocity slip factors on three-dimensional dual phase nanomaterials liquid flow towards an exponentially stretchable surface

Scientific Reports, 2022
The fundamental purpose of this research is to elaborate on slip boundary conditions and the flow of three-dimensional, stable, incompressible, rotating movements of nanoparticles lying across a stretchable sheet. The mathematical model for fluid flow is
Azad Hussain, Nevzat Akkurt, Aysha Rehman, Haifaa F. Alrihieli, Fahad M. Alharbi, Aishah Abdussattar, Sayed M. Eldin   +6 more
doaj   +1 more source

Fracture and Friction: Stick-Slip Motion

, 2004
We discuss the stick-slip motion of an elastic block sliding along a rigid substrate. We argue that for a given external shear stress this system shows a discontinuous nonequilibrium transition from a uniform stick state to uniform sliding at some ...
Brener, Efim A., Malinin, S. V., Marchenko, V. I.   +2 more
core   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Magnetohydrodynamic Viscous Flow Over a Shrinking Sheet With Second Order Slip Flow Model [PDF]

, 2014
In this paper, we investigate the magnetohydrodynamic viscous flow with second order slip flow model over a permeable shrinking surface. We have obtained the closed form of exact solution of Navier-Stokes equations by using similarity variable technique.
Abbas, G., Mahmood, T., Shah, S. Munawar
core   +1 more source

Fault slip and rupture velocity inversion by isochrone backprojection [PDF]

Geophysical Journal International, 2006
SUMMARY A new technique is proposed here for the retrieval of slip images from the backprojection of high-frequency displacement records. When direct S waves are seen to be dominant in the near-source data, Green functions can be approximated by the far-field terms, as described by ray theory. Assuming that the slip rapidly reaches the final value (i.e.
FESTA, GAETANO, ZOLLO, ALDO
openaire   +2 more sources