Results 31 to 40 of about 17,787 (238)

On a class of first order nonlinear functional differential equations of neutral type [PDF]

, 1987
Consider the neutral differential equation ddt [y(t) + py(t − τ)] + qy(t − σ) = 0, t ≧ t0 (∗) where p, q, τ, and σ are real numbers. Then a necessary and sufficient condition for the oscillation of (∗) is that the characteristic equation λ + pλe−λτ + qe ...
Ladas, G, Meimaridou, A, Jaroš, Jaroslav, Kusano, Takaŝi, Grove, E.A   +4 more
core   +1 more source

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

Oscillatory Properties of the Solutions of First Order Linear Neutral Differential Equations with "Maxima"

, 2013
In this paper we consider a neutral differential equation with "maxima" of the form [x(t) + p(t)x(σ(t))] + q(t) max x(s) = 0 We obtained sufficient conditions for oscillation of all the solutions when t→∞
Zuzana Malacka
core   +1 more source

Molecular Dynamics Studies of Shape Memory Polymers: From Bead–Spring Models to Atomistic Simulations

Advanced Engineering Materials, EarlyView.
Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley   +1 more source

Global existence results for second order neutral functional differential equation with state-dependent delay [PDF]

, 2016
summary:Our aim in this work is to provide sufficient conditions for the existence of global solutions of second order neutral functional differential equation with state-dependent delay.
Medjadj, Imene, Benchohra, Mouffak
core   +1 more source

Oscillatory Behavior of Third-Order Quasi-Linear Neutral Differential Equations

, 2021
In this paper, we consider a class of quasilinear third-order differential equations with a delay argument. We establish some conditions of such certain third-order quasi-linear neutral differential equation as oscillatory or almost oscillatory.
Samad Noeiaghdam, Shyam Sundar Santra, Elmetwally M. Elabbasy, Belgees Qaraad, Denis Sidorov, Osama Moaaz   +5 more
core   +1 more source

Oscillatory properties of fourth-order neutral differential equations using new monotonic properties

Miskolc Mathematical Notes
The authors investigate the asymptotic behavior of solutions of the fourth-order half-linear neutral differential equation (α(t) ((μ(t)+d(t)μ(a(t)))‴)b)′+m(t)μb(δ(t))=0(e)α′(t ...
Kannan Suresh, Ganesh Purushothaman, John R. Graef, Ethiraju Thandapani   +3 more
doaj   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Experimental and Numerical Modal Analysis of Composite Sandwich Structures Using Surfboards as Model Systems

Advanced Engineering Materials, EarlyView.
This article presents an experimental and numerical modal investigation of composite sandwich structures using surfboards as model systems. By comparing different core materials and reinforcement strategies, the study demonstrates how local stiffeners influence vibrational response and introduce characteristic modal features, highlighting modal ...
Brett Connellan, Luca Lomazzi, Mathis Mercier, Kara Stark, Marc in het Panhuis   +4 more
wiley   +1 more source

A study on the oscillation of second-order neutral differential equations in noncanonical form

Electronic Journal of Qualitative Theory of Differential Equations
This paper analyzes the oscillation of the second-order neutral differential equation in noncanonical form \[ \left[r(t)\left(\left(x(t)+p(t)x(\pi(t))\right)^{\prime}\right)^{\alpha}\right]^{\prime} + k(t)x^{\beta}(\eta(t))=0.
Ercan Tunç
doaj   +1 more source