Results 21 to 30 of about 373,483 (293)

The Hellan-Herrmann-Johnson Method for Nonlinear Shells

, 2019
In this paper we derive a new finite element method for nonlinear shells. The Hellan-Herrmann-Johnson (HHJ) method is a mixed finite element method for fourth order Kirchhoff plates.
Neunteufel, Michael, Schöberl, Joachim
core   +1 more source

Performance Evaluation of Nonlinear Viscoelastic Materials using Finite Element Method

International Journal of Applied Mechanics and Engineering
This research paper applies the finite element method as a methodology to evaluate the structural performance of nonlinear viscoelastic solids. A finite element algorithm was built and developed to simulate the mathematical nonlinear viscoelastic ...
Laith Sabri, Adnan Al-Tamimi, Fathi Alshamma, M Mohammed, Kareem Salloomi, Oday Abdullah   +5 more
doaj   +1 more source

Nonlinear finite element calculations in problems of strength of lifting-transport machines [PDF]

Научно-технический вестник Брянского государственного университета, 2016
The main approaches to lifting-transport machines simulation by finite elements method are under consideretion in this article. Contains general provisions for performing nonlinear finite element calculations of load-bearing metal structures of handling ...
Titov N.A.
doaj  

A Two-Grid Finite Element Method for a Second-Order Nonlinear Hyperbolic Equation

Abstract and Applied Analysis, 2014
We present a two-grid finite element scheme for the approximation of a second-order nonlinear hyperbolic equation in two space dimensions. In the two-grid scheme, the full nonlinear problem is solved only on a coarse grid of size H.
Chuanjun Chen, Wei Liu, Xin Zhao
doaj   +1 more source

A nonlinear local equivalent stress method in stress analysis of concrete gravity dam

Results in Physics, 2019
When the stress state of the structure is analyzed by the finite element method (FEM), the stress at the stress concentration points such as the dam’s heel and toe gets infinitely larger as the element size decreases.
Nam-Hyok Ri, Zhihua Chen, Yong-Sop Ri, Nam-Jin Son, Zhiyao Ma, Yong-Il So   +5 more
doaj   +1 more source

Extended Kalman Filter Nonlinear Finite Element Method for Nonlinear Soft Tissue Deformation

Computer Methods and Programs in Biomedicine, 2021
Soft tissue modelling is crucial to surgery simulation. This paper introduces an innovative approach to realistic simulation of nonlinear deformation behaviours of biological soft tissues in real time.This approach combines the traditional nonlinear finite-element method (NFEM) and nonlinear Kalman filtering to address both physical fidelity and real ...
Hujin Xie, Jialu Song, Yongmin Zhong, Jiankun Li, Chengfan Gu, Kup-Sze Choi   +5 more
openaire   +3 more sources

An Adaptive Human Pilot Model With Reaction Time Delay for Enhanced Adaptive Control in Piloted Systems

International Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces an adaptive human pilot model that captures pilot time‐delay effects in adaptive control systems. The model enables the prediction of pilot–controller interactions, facilitating safer integration and improved design of adaptive controllers for piloted applications.
Abdullah Habboush, Yildiray Yildiz
wiley   +1 more source

The Vanishing Moment Method for Fully Nonlinear Second Order Partial Differential Equations: Formulation, Theory, and Numerical Analysis [PDF]

, 2011
The vanishing moment method was introduced by the authors in [37] as a reliable methodology for computing viscosity solutions of fully nonlinear second order partial differential equations (PDEs), in particular, using Galerkin-type numerical methods such
Feng, Xiaobing, Neilan, Michael
core  

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

International Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg, Paulo Jefferson Dias de Oliveira Evald, Shivam Chaturvedi, Hilton Abilio Gründling, Rodrigo Varella Tambara, Wencong Su   +5 more
wiley   +1 more source

Finite element models for the analysis of nonlinear deformation of shells stepwise-variable thickness with holes, channels and cavities

Инженерно-строительный журнал, 2015
The method of solving static problems of nonlinear deformation, buckling, and postbuckling behavior of thin elastic inhomogeneous shells is based on the geometrically nonlinear equations of the 3D thermoelasticity theory and use of the moment finite ...
N.A. Solovei, O.P. Krivenko, O.A. Malygina   +2 more
doaj   +1 more source