scholarly journals NONLOCAL IN TIME MODEL OF MATERIAL DAMPING IN COMPOSITE STRUCTURAL ELEMENTS DYNAMIC ANALYSIS

2021 ◽  
Vol 17 (4) ◽  
pp. 14-21
Author(s):  
Vladimir Sidorov ◽  
Elena Badina ◽  
Elena Detina
Keyword(s):  
Numerical Simulation ◽  
Dynamic Equilibrium ◽  
Energy Requirement ◽  
Previous History ◽  
Three Dimensional ◽  
Material Damping ◽  
Element Analysis ◽  
Time Model ◽  
Damping Model ◽  
With Memory

In this paper the problem of numerical simulation of composite bending elements dynamic considering internal (material) damping. For this purpose the nonlocal in time damping model, called damping with memory, is proposed as an alternative to the classic local Kelvin-Voigt model. Damping with memory makes damping forces not only dependent on the instant value of the strain rate, but also on the previous history of the vibration process. Since finite element analysis is the most common method of structural analysis, the nonlocal damping model is integrated into FEA algorithm. The FEA dynamic equilibrium equation is solved using the explicit scheme. The damping matrix was developed using the stationary full energy requirement. One-dimensional nonlocal in time model was implemented in MATLAB software package. The results of three-dimensional numerical simulation of the composite beam vibration obtained in SIMULIA Abaqus were used for model calibration. The obtained results were compared to the results based on classic Kelvin-Voight damping model.

Lumped Parameter and Three-Dimensional Computational Fluid Dynamics Simulation of a Variable Displacement Vane Pump for Engine Lubrication

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Massimo Rundo ◽  
Giorgio Altare
Keyword(s):  
Dynamic Equilibrium ◽  
Three Dimensional ◽  
Flow Speed ◽  
Dynamics Simulation ◽  
Displacement Control ◽  
Vane Pump ◽  
Element Analysis ◽  
Transient Model ◽  
Variable Displacement Vane Pump ◽  
Variable Displacement

The paper describes the modeling and the experimental tests of a variable displacement vane pump for engine lubrication. The approach used for the simulation has involved three-dimensional (3D) commercial tools for tuning a zero-dimensional (0D) customized model implemented in the LMS Amesim® environment. Different leakage paths are considered and the axial clearances are variable to take into account the deformation of the pump cover, calculated through a finite element analysis with ANSYS. The vane tip clearances are calculated as function of the dynamic equilibrium equation of the vanes. The displacement control takes into account the internal forces on the stator due to the pressure in all variable chambers and to the contact force exerted by the vanes. The discharge coefficients in the resistive components have been tuned by means of a complete 3D transient model of the pump built with PumpLinx®. The tuned 0D model has been proved to be reliable for the determination of the steady-state flow-speed and flow-pressure curves, with a correct estimation of the internal leakages and of the pressure imposed by the displacement control. The pump has been also tested using a simplified circuit, and a fair agreement has been found in the evaluation of the delivery pressure ripple.

Finite Element Analysis of the Surface Settlement Induced by the Shield Tunnel Construction

2014 ◽  
Vol 501-504 ◽  
pp. 111-114
Author(s):  
Ling Xia Gao ◽  
Xiang Jun Yang ◽  
Li Kun Qin
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Three Dimensional ◽  
Longitudinal Direction ◽  
Element Model ◽  
Surface Settlement ◽  
Shield Tunnel ◽  
Empirical Formulas ◽  
Element Analysis ◽  
Polynomial Expression

Three-dimensional non-linearity finite element model of shield tunnel was established on basis of the Z1 line of Tianjin subway. And then it was applied to simulate construction process of shield tunnel. Surface settlement of the tunnel during the construction was obtained. The settlement data of transverse and longitudinal direction from numerical simulation were fitted through a polynomial expression. Then a contrastive analysis of curves from numerical simulation and matching formulae were made. The result shows that it is feasible to utilize the empirical formulas like Pecks to predict surface settlement in Tianjin caused by shield construction.

Analysis of the Ring Die of Biomass Energy Molding Machine Based on ANSYS

2013 ◽  
Vol 561 ◽  
pp. 417-421
Author(s):  
Bing Cheng Liu ◽  
Yao Xian Shang ◽  
Yuan Min Xu ◽  
Xiao Ming Liang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Cone Angle ◽  
Three Dimensional ◽  
Biomass Energy ◽  
Analysis Software ◽  
Molding Machine ◽  
Element Analysis ◽  
Abrasion Wear ◽  
Material Wear

In this paper, we analyze the abrasion wear of the ring die in the theoretical way. Firstly, we obtain the abrasion wear belonging to three-dimensional abrasion wear and soft material wear , then realize three-d modeling of the ring die with the aid of Pro/Engineering. Lastly, we conduct numerical simulation by using finite element analysis software ANSYS, and we draw a conclusion that die cone angle and radian are the important elements to the life of the ring die.

A Numerical Simulation of Finite-Width Thrust Bearings, Taking into Account Viscosity Variation with Temperature and Pressure

1975 ◽  
Vol 17 (1) ◽  
pp. 1-10 ◽  
Author(s):  
A. K. Tieu
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Three Dimensional ◽  
Finite Width ◽  
Element Analysis ◽  
Factors Affecting ◽  
Oil Film ◽  
Thrust Bearings ◽  
Carry Over ◽  
Thrust Pad

A variational principle for a thin-film incompressible flow with viscous dissipation has already been formulated as the basis of a finite-element analysis and applied to solve the oil-film energy equation for the case of infinitely wide thrust bearings (1)†. Here, the finite-element method is extended to a three-dimensional oil film, the pressure and temperature distributions of which agree very well with those obtained from other theoretical and experimental work. Allowance for various factors affecting thrust-pad performance, such as hot oil carry-over, rotor surface temperature and pad radial tilting, in the non-isoviscous bearing analysis has been shown to improve the agreement between numerical simulation and experiment.

Numerical Simulation of Tire Steady-State Temperature Field Based on ANSYS Workbench

2012 ◽  
Vol 501 ◽  
pp. 382-387
Author(s):  
Jing Li ◽  
Ze Peng Wang ◽  
Wen Xiu Liu ◽  
Fa Hu Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Temperature Field ◽  
Three Dimensional ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Steady State Temperature ◽  
Structure And Design ◽  
Ansys Workbench

The three-dimensional axial symmetry FEA (finite-element analysis) model is established for 165/70R13 type tire based on ANSYS Workbench FEA software, and numerical simulation at temperature field is implemented, which reflects the temperature distribution at each part of tire intuitively, and has a certain guiding significance of improving tire structure and design.

Effects of occlusal scheme on All-on-Four abutments, screws and prostheses: A three-dimensional finite element study

2020 ◽  
Author(s):  
Nurullah Türker ◽  
Hümeyra Tercanlı Alkış ◽  
Steven J Sadowsky ◽  
Ulviye Şebnem Büyükkaplan
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Good Prognosis ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Group Function ◽  
Occlusal Contact ◽  
Maximum Deformation ◽  
Contact Points ◽  
Von Mises

An ideal occlusal scheme plays an important role in a good prognosis of All-on-Four applications, as it does for other implant therapies, due to the potential impact of occlusal loads on implant prosthetic components. The aim of the present three-dimensional (3D) finite element analysis (FEA) study was to investigate the stresses on abutments, screws and prostheses that are generated by occlusal loads via different occlusal schemes in the All-on-Four concept. Three-dimensional models of the maxilla, mandible, implants, implant substructures and prostheses were designed according to the All-on-Four concept. Forces were applied from the occlusal contact points formed in maximum intercuspation and eccentric movements in canine guidance occlusion (CGO), group function occlusion (GFO) and lingualized occlusion (LO). The von Mises stress values for abutment and screws and deformation values for prostheses were obtained and results were evaluated comparatively. It was observed that the stresses on screws and abutments were more evenly distributed in GFO. Maximum deformation values for prosthesis were observed in the CFO model for lateral movement both in the maxilla and mandible. Within the limits of the present study, GFO may be suggested to reduce stresses on screws, abutments and prostheses in the All-on-Four concept.

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