The time finite element methods

This work uses the finite element method for the first time to simulate the dynamic response of nanoplates resting on a two-parameter elastic foundation under the flexoelectric effect. The calculation formulas are derived from the new type of the shear deformation theory, which is a simple shear deformation theory.

8p dathienlang1012 03-05-2024 1 0   Download

Part 2 book "Advanced mechanics of materials" includes content: Beams on elastic foundations, the thick wall cylinder, elastic and inelastic stability of columns, flat plates, stress concentrations, fracture mechanics, fatigue - progressive fracture, creep, time dependent deformation, contact stresses, the finite element method.

408p muasambanhan06 03-02-2024 2 1   Download

In this study, masonry infills are considered a building envelope with loadbearing function. A finite element procedure for the effective properties of microcracked viscoelastic masonry based on homogenization technique is provided to take into account the influence of crack density and time.

15p vimclaren 20-10-2022 5 2   Download

Photoelasticity images of pulsed laser ablation in water and in air were simulated by Finite Element Method. In the paper "Compare transient stress induced in in-air and in-water laser ablation using simulation method", the Von Mises stress distribution in the target is deduced from the simulated images and is compared between the two-ablation regimes. The result confirms that pulse laser ablation in the water can induced a stress about 100 times higher than that induced in ablation in the air.

4p runordie2 06-06-2022 10 0   Download

Eddy currents always appear in any conduction regions of all types electrical devices, such as electrical apparatus, the cores of transformers, rotating electrical machines, which are subjected to a time-varying magnetic field variation. This leads to an increase of losses and a descrease of efficiency for electrical devices.

6p viirenerosenfeld 02-06-2022 14 1   Download

In this method, the internal DOFs are separated from the boundary DOFs, and decomposed onto a basis of static modes, and a basis of fixed interface modes [Craig et Bampton, 1968]. The use of a reduced basis for the fixed interface modes makes it possible to reduce the size of the system to be solved, and therefore to save the computational time compared to a classical finite element computation involving the complete system.

7p vishivnadar 17-01-2022 26 0   Download

The finite element method (FEM) has been successful in simulating complex physical systems in science and engineering. A big challenge of using the FEM is how to reduce computation time in large-scale problems. In this paper, we propose combining the FEM and an Adaptive Mesh Refinement (AMR) technique for solving an incompressible fluid flow on unstructured grids.

7p viericschmid 12-01-2022 15 0   Download

In this article, a simplified variant for the TFEM is proposed where the shape functions similar to the ones for a (spatial) axial bar are used. The accuracy in the obtained results of some numerical examples is found to be comparable with the accuracy in the previous results.

12p inception36 30-11-2021 15 1   Download

This paper proposes an optimal design “modern” approach for servomotors. This approach consists of the optimization algorithms at the initial analytical calculations and the modelling of the virtual prototype in order to reduce the costly and time-consuming prototyping loops of the “conventional” design method. The optimal design of a servomotor for robot application is verified by using finite element analysis (FEA) in terms of torque at low to high speeds.

8p spiritedaway36 28-11-2021 5 0   Download

Lecture Finite element method: Chapter 3 - Dynamic analysis, after studying this section will help you understand: Introduction; Modal analysis; Transient analysis.A dynamic analysis is a technique used to determine the dynamic behavior of a structure or component. It is an analysis involving time, where the inertia and possibly damping of the structure play an important role.

40p billyelliot 11-11-2021 23 0   Download

In the ultimate limit state design of ship hulls, the safety and economy have the most important position in the whole design of ship structures. In this paper, ultimate strength of ship hull has been calculated by using the finite-element software. The modeling method which is suitable for ultimate strength calculation is gained. At the same time, ultimate loading capacity’s variation of series bulk carriers with length is gained.

7p quenchua10 18-01-2021 14 1   Download

In this paper, the technique is applied to analyze transient heat transfer problems. In order increase time efficiency, a modelreduction technique, namely the proper orthogonal decomposition (POD), is employed. The idea is that a given large-size problem is projected into a small-size one which can be solved faster but still maintain the required accuracy.

10p larachdumlanat127 02-01-2021 9 2   Download

In this paper, the subproblem method with using edge finite elements is proposed for coupling subproblems via several steps to treat and deal with some troubles regarding to electromagnetic problems that gets quite difficulties when directly applying a finite element method. In the strategy subproblem method, it allows a complete problem to define into several subproblems with adapted dimensions. Each subproblem can be solved on its independent domain and mesh without performing in whole domain or mesh. This easily supports meshing and decreases computing time.

7p larachdumlanat127 02-01-2021 16 2   Download

For study of car-pedestrian crashes, it is two common methods that can be employed: conducting crash tests with mechanical dummies and simulating car crashes on computer. The former is a traditional way and gives good results compared with real life car impact; however, its disadvantage is very expensive test equipment and generally more time-consuming than the latter because after every crash test, experimental vehicles as well as dummies need repairing to be ready for the next experiments.

9p trinhthamhodang9 04-12-2020 14 2   Download

In the present paper, a comparison between five different shell finite elements, including the Linear Triangular Element, Linear Quadrilateral Element, Linear Quadrilateral Element based on deformation modes, 8-node Quadrilateral Element, and 9-Node Quadrilateral Element was presented. The shape functions and the element equations related to each element were presented through a detailed mathematical formulation. Additionally, the Jacobian matrix for the second order derivatives was simplified and used to derive each element’s strain-displacement matrix in bending.

14p caygaocaolon1 13-11-2019 19 1   Download

Timber is highly anisotropic. It behaves differently in diverse directions. Tension and compression perpendicular to the grain present a low strength with respect to the ones parallel to the grain. To compensate for the lack, the self-tapping screw is an excellent choice for reinforcing the timber. This paper focuses on the notched timber beam with the experimental and numerical results. In the first part, the experimental results of the unreinforced notched beams and the screw reinforced notched beams under bending load will be presented.

7p caygaocaolon1 13-11-2019 7 0   Download

Due to material savings and acceleration time reduction, robotic manipulators are designed to be more slender. Therefore, the elasticity of the links should be taken into account in the dynamic study and control design. This paper concerns modeling and control of a single flexible manipulator (SFM).

12p vidonut2711 08-11-2019 16 0   Download

We present the solution of a second-order nonlinear parabolic interface problem on a quasiuniform triangular finite element with a linearized four-step implicit scheme used for the time discretization. The convergence of the scheme in L2-norm is established under certain regularity assumptions using interpolation and elliptic projection operators.

16p nutifooddau 21-01-2019 23 1   Download

The paper presents the analysis of moisture transfer in this covering semipermeable layer to estimate the lag time of rainfall recharge to the Holocene aquifer in Hung Yen province in the Red River delta. A finite element modeling had been developed and applied for this purpose.

0p meolep4 02-01-2019 34 1   Download

In this paper a wavelet spectrum technique for monitoring the breathing crack phenomenon of a beam-like bridge subjected to moving vehicle is presented. The stiffness of element with a breathing crack is modeled as a time dependent stiffness matrix using the finite element method.

17p thienthanquydu 17-10-2018 37 0   Download