Results 71 to 80 of about 806,938 (302)

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Anti-Unwinding Attitude Control with Fixed-Time Convergence for a Flexible Spacecraft

International Journal of Aerospace Engineering, 2017
This paper investigates the fixed-time attitude tracking control problem for flexible spacecraft with unknown bounded disturbances. First, with the knowledge of norm upper bounds of external disturbances and the coupling effect of flexible modes, a novel
Chutiphon Pukdeboon, Anuchit Jitpattanakul   +1 more
doaj   +1 more source

Performance Regulation and Tracking via Lookahead Simulation: Preliminary Results and Validation

, 2017
This paper presents an approach to target tracking that is based on a variable-gain integrator and the Newton-Raphson method for finding zeros of a function.
Buckley, I., Egerstedt, M., Seatzu, C., Wardi, Y.   +3 more
core   +1 more source

Two-to-one resonant multi-modal dynamics of horizontal/inclined cables. Part I : theoretical formulation and model validation [PDF]

, 2007
This paper is first of the two papers dealingwith analytical investigation of resonant multimodal dynamics due to 2:1 internal resonances in the finite-amplitude free vibrations of horizontal/inclined cables. Part I deals with theoretical formulation and
A. Berlioz, A. Luongo, A. Luongo, A.H. Nayfeh, A.H. Nayfeh, A.H. Nayfeh, C.L. Lee, C.L. Lee, F. Benedettini, F. Benedettini, G. Rega, G. Rega, G. Rega, G. Rega, G. Zheng, G.V. Rao, Giuseppe Rega, H.M. Irvine, H.N. Arafat, K. Takahashi, M. Pakdemirli, N. Srinil, N. Srinil, N.C. Perkins, Narakorn Srinil, P. Hagedorn, Q. Wu, R.W. Gehle, S.R.K. Nielsen, Somchai Chucheepsakul, V. Gattulli, W. Lacarbonara, W. Lacarbonara, W. Lacarbonara, Y. Cai, Y.Y. Zhao, Z. Yu   +36 more
core   +2 more sources

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

On the Generalized Hilfer Fractional Coupled Integro-Differential Systems with Multi-Point Ordinary and Fractional Integral Boundary Conditions

Axioms
In this paper, we investigate a nonlinear coupled integro-differential system involving generalized Hilfer fractional derivative operators ((k,ψ)-Hilfer type) of different orders and equipped with non-local multi-point ordinary and fractional integral ...
Chayapat Sudprasert, Sotiris K. Ntouyas, Bashir Ahmad, Ayub Samadi, Jessada Tariboon   +4 more
doaj   +1 more source

Selection of the ground state for nonlinear Schroedinger equations

, 2003
We prove for a class of nonlinear Schr\"odinger systems (NLS) having two nonlinear bound states that the (generic) large time behavior is characterized by decay of the excited state, asymptotic approach to the nonlinear ground state and dispersive ...
A. SOFFER, Buslaev V. S., Cazenave T., Coddington E., Cycon H. L., Davies E. B., Fröhlich J., Goodman R. H., Kwong M., M. I. WEINSTEIN, Murata M., Reed M., Reed M., Sulem C., Tsai T.-P., Vanderbauwhede A.   +15 more
core   +1 more source

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

Advanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek, Jakub Hurník, Miroslav Šmíd, Ondřej Zobač, Melanie Todt, Daniel Koutný   +5 more
wiley   +1 more source

Lyapunov’s type inequalities for hybrid fractional differential equations

Journal of Inequalities and Applications, 2016
We investigate new results about Lyapunov-type inequalities by considering hybrid fractional boundary value problems. We give necessary conditions for the existence of nontrivial solutions for a class of hybrid boundary value problems involving Riemann ...
Surang Sitho, Sotiris K Ntouyas, Weera Yukunthorn, Jessada Tariboon   +3 more
doaj   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source