Results 101 to 110 of about 11,684,150 (395)

Influence of Temperature on Scratch and Wear Properties of Technical Thermoplastics: Implications for Material Selection

open access: yesAdvanced Engineering Materials, EarlyView.
The share of technical thermoplastics is expected to grow further in the e‐mobility segment. In this study, a detailed temperature‐based tribological characterization of technical thermoplastics is performed. The tribological properties are discussed in terms of the dynamic mechanical properties of polymers at different ambient temperatures. A proof of
Harsha Raghuram   +2 more
wiley   +1 more source

Relaxation at late stages in an entropy barrier model for glassy systems

open access: yes, 1997
The ground state dynamics of an entropy barrier model proposed recently for describing relaxation of glassy systems is considered. At stages of evolution the dynamics can be described by a simple variant of the Ehrenfest urn model.
Darling D A   +8 more
core   +1 more source

Decay rates for solutions of semilinear wave equations with a memory condition at the boundary

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2002
In this paper, we study the stability of solutions for semilinear wave equations whoseboundary condition includes a integral that represents the memory effect.
M. L. Santos
doaj   +1 more source

Femtosecond Single‐ and Double‐Pulse Fabrication of Periodic Nanostructures on Stainless Steel for Surface‐Enhanced Raman Spectroscopy

open access: yesAdvanced Engineering Materials, EarlyView.
Periodic submicron features are fabricated on 304 stainless steel using single and double femtosecond laser pulses. By adjusting polarization, fluence, and inter‐pulse delay, 1D and 2D nanostructures are formed. Enhanced hydrophobicity and dense surface‐enhanced Raman spectroscopy hotspots enable analyte detection down to 10−10 M with good ...
Balaji Baskar   +3 more
wiley   +1 more source

Theoretical study of finite temperature spectroscopy in van der Waals clusters. II Time-dependent absorption spectra

open access: yes, 2002
Using approximate partition functions and a master equation approach, we investigate the statistical relaxation toward equilibrium in selected CaAr$_n$ clusters.
Calvo F.   +5 more
core   +1 more source

A blow-up result for a viscoelastic system in $R^n

open access: yesElectronic Journal of Differential Equations, 2007
In this paper we consider a coupled system of nonlinear viscoelastic equations. Under suitable conditions on the initial data and the relaxation functions, we prove a finite-time blow-up result.
Salim A. Messaoudi, Mohammad Kafini
doaj  

The Effect of Elastic–Plastic Mismatch and Interface Proximity on the Fracture Toughness of Ti‐TiN Thin Films

open access: yesAdvanced Engineering Materials, EarlyView.
Multilayering of TiN film with metallic Ti film is adopted to enhance the fracture resistance of TiN thin films. Plastic dissipation within Ti with process zone size of ≈250 nm, along with elastic–plastic mismatch driven changes to crack driving force enhances the crack growth resistance by ten times, enabling physics informed design of optimized ...
Nidhin George Mathews   +5 more
wiley   +1 more source

1/f spectrum and memory function analysis of solvation dynamics in a room-temperature ionic liquid

open access: yes, 2008
To understand the non-exponential relaxation associated with solvation dynamics in the ionic liquid 1-ethyl-3-methylimidazolium hexafluorophosphate, we study power spectra of the fluctuating Franck-Condon energy gap of a diatomic probe solute via ...
Daun Jeong   +9 more
core   +1 more source

First‐Principles Modeling of Solid Solution Softening and Hardening Effects in Al–Mg–Zr–Si Aluminum Alloys

open access: yesAdvanced Engineering Materials, EarlyView.
The role of various alloying elements in face‐centered cubic aluminum on the barrier of a Shockley partial dislocation during its motion is presented. The study aims to understand how alloying atoms such as Mg, Si, and Zr affect the energy landscape for dislocation motion, thus influencing the solid solution hardening and softening in aluminum, which ...
Inna Plyushchay   +3 more
wiley   +1 more source

Rotational Brownian motion on the sphere surface and rotational relaxation

open access: yes, 2006
The spatial components of the autocorrelation function of noninteracting dipoles are analytically obtained in terms of rotational Brownian motion on the surface of a unit sphere using multi-level jumping formalism based on Debye's rotational relaxation ...
Aydiner E   +9 more
core   +2 more sources

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