Results 91 to 100 of about 473,143 (311)

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source

Time integration algorithms for finite element analysis of creep problems

, 1989
Bibliography: leaves 127-132.The fundamental principles involved in the selection and implementation of time integration schemes for finite element analysis of nonlinear creep problems are investigated.
Marais, Nicholas John
core  

Low Cycle Repetitive Loading of Ti‐6Al‐4V‐Epoxy Composite Lattice Structures for Enhanced Energy Dissipation and Damage Tolerance

Advanced Engineering Materials, EarlyView.
Composite Ti–6Al–4V–epoxy lattice structures are additively manufactured and epoxy infiltrated for cyclic loading. At low lattice volume fractions, hybridization produces synergistic gains in stiffness and energy dissipation. At higher volume fractions, synergy diminishes, although composites still exceed metallic lattices in specific energy ...
Joey Tallon, Jordan Noronha, Justin Dirrenberger, Andrey Molotnikov   +3 more
wiley   +1 more source

Finite-time stability and boundedness for linear switched singular positive time-delay systems with finite-time unstable subsystems

Systems Science & Control Engineering, 2020
In this paper, the problem of finite-time stability and finite-time boundedness for a class of linear switched singular positive time-delay systems with finite-time unstable subsystems is investigated.
Suriyon Yimnet, Piyapong Niamsup
doaj   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Dynamic performance analysis of attitude control for statically unstable aircraft

Systems Science & Control Engineering
The key to the flight control of statically unstable aircraft (SUA) is to maintain attitude stability; however, some SUA use large boosters during the boost section to obtain a relatively high initial energy, which causes the centre of gravity biased to ...
Limin Zhang, Xi Li, Ruoyang Liu, Shuai Guo, Weiqi Ma   +4 more
doaj   +1 more source

From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices

Advanced Engineering Materials, EarlyView.
Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle, María Ángeles Navacerrada, Johan Christensen, Carlos González   +3 more
wiley   +1 more source

Interference and diffraction analysis of holographic gratings using the Finite-Difference Time-Domain method [PDF]

, 2010
The Finite-Difference Time-Domain method (FDTD) is based on a time-marching algorithm that has proven accurate in predicting microwave scattering from complicated objects.
Pérez Molina, Manuel, Beléndez, Augusto, Neipp, Cristian, Bleda, Sergio, Francés, Jorge   +4 more
core  

Finite-time boundedness and stabilization of switched linear systems [PDF]

, 2009
summary:In this paper, finite-time boundedness and stabilization problems for a class of switched linear systems with time-varying exogenous disturbances are studied. Firstly, the concepts of finite-time stability and finite-time boundedness are extended
Du, Haibo, Lin, Xiangze, AMATO F, AMBROSINO, ROBERTO, Li, Shihua, Amato F., Ariola M., ARIOLA, Marco, Ambrosino R., COSENTINO C.   +9 more
core   +1 more source

Time-Synchronized Convergence Control for n-DOF Robotic Manipulators with System Uncertainties

Sensors
A time-synchronized (TS) convergence control method for robotic manipulators is proposed. Adversely to finite-time control, a notion of time-synchronization convergence is introduced based on the ratio persistence property, which can ensure that all ...
Duansong Wang, Gang Zhang, Tan Zhang, Jinzhong Zhang, Rui Chen   +4 more
doaj   +1 more source