Results 41 to 50 of about 1,312,953 (304)

Finite element model of reinforcement corrosion in concrete

Water Science and Engineering, 2009
A nonlinear finite element model (FEM) of the corrosion of steel reinforcement in concrete has been successfully developed on the basis of mathematical analysis of the electrochemical process of steel corrosion in concrete.
Jin-xia Xu, Lin-hua Jiang, Qi Wang
doaj   +1 more source

Finite Element Approaches to Model Electromechanical, Periodic Beams

Applied Sciences, 2020
Periodic structures have some interesting properties, of which the most evident is the presence of band gaps in their frequency spectra. Nowadays, modern technology allows to design dedicated structures of specific features.
Wiktor Waszkowiak, Marek Krawczuk, Magdalena Palacz   +2 more
doaj   +1 more source

Effect of Foot Orthoses on Midfoot Pain and the Volume of Bone Marrow Lesions in the Midfoot: A Randomized Mechanism of Action Study

Arthritis Care &Research, EarlyView.
Objective Foot orthoses are thought to improve pain by potentially modifying internal mechanical forces. To test this, we explored whether foot orthoses can modify patterns of bone marrow lesions (BMLs) in people with midfoot pain. Methods Forty‐two people were recruited with midfoot pain, and magnetic resonance imaging–confirmed midfoot BMLs ...
Jill Halstead, Anne‐Maree Keenan, Philip G. Conaghan, Dennis McGonagle, Anthony C. Redmond   +4 more
wiley   +1 more source

DETERMINATION OF FRACTURE MECHANICS PARAMETERS FOR BODIES GYRATION IN UNSTEADY DYNAMIC PROBLEMS

Nauka ta progres transportu, 2011
On the basis of semi-analytical final elements method data validity research and research of effective determination of fracture mechanics parameters for bodies of revolution in non-stationary dynamics problems were conducted.
V. A. Bazhenov, I. I. Solodei, M. O. Vabishchevych   +2 more
doaj  

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Finite element analysis of vibration-driven electro-active paper energy harvester with experimental verification

Advances in Mechanical Engineering, 2015
In this research work, a coupled-field finite element model of electro-active paper energy harvester is presented, and the results are verified experimentally. Electro-active paper is a smart form of cellulose coated with electrodes on both sides.
Zafar Abas, Heung Soo Kim, Lindong Zhai, Jaehwan Kim   +3 more
doaj   +1 more source

Finite-Element Sea Ice Model (FESIM), version 2 [PDF]

Geoscientific Model Development, 2015
The Finite-Element Sea Ice Model (FESIM), used as a component of the Finite-Element Sea ice Ocean Model, is presented. Version 2 includes the elastic-viscous-plastic (EVP) and viscous-plastic (VP) solvers and employs a flux corrected transport algorithm ...
S. Danilov, Q. Wang, R. Timmermann, N. Iakovlev, D. Sidorenko, M. Kimmritz, T. Jung, J. Schröter   +7 more
doaj   +1 more source

Single side damage simulations and detection in beam-like structures [PDF]

, 2015
Beam-like structures are the most common components in real engineering, while single side damage is often encountered. In this study, a numerical analysis of single side damage in a free-free beam is analysed with three different finite element models ...
Abdel Wahab, Magd, Figueiredo, E, Maia, N, Perera, R, Sampaio, R, Zhou, Yun-Lai   +5 more
core   +1 more source

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

Parameter Updating of Helicopter Airframe Finite Element Model Based on Response Surface Method

Nanjing Hangkong Hangtian Daxue Xuebao
In order to reduce the deviation between the finite element model of helicopter airframe and the actual model， a helicopter airframe model updating method based on the response surface method is adopted， which uses a hypersurface function to ...
ZHU Yin, HAN Dong
doaj   +1 more source