scholarly journals Finite-element procedure for calculating the three-dimensional inelastic bowing of fuel rods (AWBA development program)

1982 ◽  
Author(s):  
S Martin
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Development Program ◽  
Fuel Rods ◽  
Finite Element Procedure

Nonconformal mesh-based finite element strategy for 3D textile composites

2016 ◽  
Vol 51 (16) ◽  
pp. 2315-2330 ◽  
Author(s):  
B Wucher ◽  
S Hallström ◽  
D Dumas ◽  
T Pardoen ◽  
C Bailly ◽  
...  
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Material Properties ◽  
Three Dimensional ◽  
Textile Composites ◽  
Thermoelastic Properties ◽  
Material Interfaces ◽  
Local Correction ◽  
Finite Element Procedure ◽  
Woven Reinforcement

A finite element procedure is developed for the computation of the thermoelastic properties of textile composites with complex and compact two- and three-dimensional woven reinforcement architectures. The purpose of the method is to provide estimates of the properties of the composite with minimum geometrical modeling effort. The software TexGen is used to model simplified representations of complex textiles. This results in severe yarn penetrations, which prevent conventional meshing. A non-conformal meshing strategy is adopted, where the mesh is refined at material interfaces. Penetrations are mitigated by using an original local correction of the material properties of the yarns to account for the true fiber content. The method is compared to more sophisticated textile modeling approaches and successfully assessed towards experimental data selected from the literature.

A Vectorial Finite Element Procedure for Solving Three-Dimensional Field Problems

1995 ◽  
pp. 197-200 ◽  
Author(s):  
G. Cannistrà ◽  
M. Minenna ◽  
G. Negros ◽  
M. Sylos Labini
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Finite Element Procedure

Frequency and Stability Analysis Method of Asymmetric Anisotropic Rotor-Bearing System Based on Three-Dimensional Solid Finite Element Method

2015 ◽  
Vol 137 (10) ◽  
Author(s):  
Ma Wei Meng ◽  
Wang Jian Jun ◽  
Wang Zhi
Keyword(s):  
Finite Element ◽  
Differential Equations ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Frequency Characteristics ◽  
Analysis Method ◽  
Rotor Bearing ◽  
Finite Element Procedure ◽  
Linear Differential ◽  
3D Solid

An efficient analysis method is suggested to investigate the frequency characteristics and stability of asymmetric anisotropic rotor-bearing systems. Modifications are made to incorporate the effect of stator asymmetry into an existing three-dimensional (3D) solid finite element procedure developed for rotors with symmetric supports. The reduced ordered linear differential equations with periodic coefficients of the asymmetric anisotropic rotor model are established in the rotating frame. The frequency characteristics and stability of the obtained periodic time-varying coefficient differential equations are investigated based on Floquet theory and Hill's method. Numerical examples and experimental studies are presented to validate the effectiveness of the presented method.

scholarly journals Three dimensional modelling of interaction between surface and Darcy flow regimes through soils

2009 ◽  
Vol 60 (7) ◽  
pp. 1911-1918 ◽  
Author(s):  
B. Kaveh-Baghbaderani ◽  
V. Nassehi ◽  
A. Kulkarni
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Surface Flow ◽  
Hydrodynamic Conditions ◽  
Dimensional Finite Element ◽  
Finite Element Procedure ◽  
Darcy Equations ◽  
Underground Flow ◽  
Three Dimensional Finite Element ◽  
The Impact

The present paper deals with the impact of surface flow on hydrodynamic conditions in saturated underground domains. A three dimensional finite element scheme has been used to simulate underground flow resulting from the flow of water over a saturated land. The results clearly show the effects of the surface flow on the hydrodynamic conditions of the subsurface porous regions. This analysis is an important prerequisite for the prediction of contaminant mobility in soils and hence provides a convenient tool for the prediction of interaction between surface and subsurface flow processes. For low permeability cases, considered here, the governing equations consist of water continuity and Darcy equations. These equations are solved using a robust and reliable finite element procedure.

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.

Sign in / Sign up

Export Citation Format

Share Document