Results 111 to 120 of about 117,106 (293)

Nonresonant high frequency excitation of mechanical vibrations in a graphene based nanoresonator

New Journal of Physics, 2015
We theoretically analyze the dynamics of a suspended graphene membrane which is in tunnel contact with grounded metallic electrodes and subjected to ac-electrostatic potential induced by a gate electrode.
Axel M Eriksson, Marina V Voinova, Leonid Y Gorelik   +2 more
doaj   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Intrinsic route to melt fracture in polymer extrusion : a weakly nonlinear subcritical instability of viscoelastic Poiseuille flow

, 2003
As is well known, the extrusion rate of polymers from a cylindrical tube or slit (a die ) is in practice limited by the appearance of melt fracture instabilities which give rise to unwanted distortions or even fracture of the extrudate. We present the
Storm, C., Saarloos, W van, Wagner, C., Bonn, D, Bertola, V., Saarloos, van, W., Storm, C Kees, Bertola, V, Bonn, D., Meulenbroek, B., Meulenbroek, B, Saarloos, W. van, Wagner, C   +12 more
core   +1 more source

On the intrinsic instability of the advective-diffusive transport

, 2004
Ministerio de Ciencia y Tecnología; DPI2002 ...
Gómez, Héctor, Colominas, Ignasi, Navarrina, Fermín, Casteleiro, Manuel   +3 more
openaire   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Convective Flux Analysis on the Instability of One-Dimensional Detonation

Aerospace
One-dimensional numerical simulations using the Euler equations and irreversible one-step Arrhenius kinetics are conducted to study the instability mechanism of a one-dimensional gaseous detonation.
Yunfeng Liu
doaj   +1 more source

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source

Intrinsic Dynamical Instability in Optical Bistability with Two-Level Atoms [PDF]

, 1984
Self-pulsing instability is reported in an experiment in which two-level atoms couple to a single mode of a traveling-wave resonator to produce optical bistability.
Rosenberger, A. T., Orozco, L. A., Kimble, H. J.   +2 more
core  

Intrinsic thermo-acoustic instability criteria based on frequency response of flame transfer function

, 2022
A study of Intrinsic Thermo-Acoustic (ITA) instability behavior of flames anchored to a burner deck is performed by introducing a mapping between the Flame Transfer Function, FTF(s), defined in the complex (Laplace) domain and the experimentally measured
Kornilov, Viktor,, Lopez Arteaga, Ines,, Kojourimanesh, Mohammad,, de Goey, Philip,   +3 more
core  

Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids

Advanced Functional Materials, EarlyView.
This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow, Samya Sen, Joaquin Yus, Eliza E. Lovrich, Amanda G. Hoika, Kelly M. Chang, Arielle A. Pfeil, Nellie Haug, Amy J. Wagoner Johnson, Randy H. Ewoldt   +9 more
wiley   +1 more source