scholarly journals 1011 FEM Analysis on the Effect of the Slip on Stress Field in Wheel Tread with White Layer

2009 ◽  
Vol 2009.47 (0) ◽  
pp. 347-348
Author(s):  
Ryota KONO ◽  
Hiroyuki AKEBONO ◽  
Masahiko KATO ◽  
Atsushi SUGETA
Keyword(s):  
Stress Field ◽  
White Layer ◽  
Fem Analysis

FEM Analysis of the Unsteady Seepage during Excavation

2014 ◽  
Vol 638-640 ◽  
pp. 457-461 ◽  
Author(s):  
Ji Liang Fan ◽  
Yan Hua Ren ◽  
Yong Hong Wu ◽  
Xiu Feng Liu ◽  
Shi Chong Zhou
Keyword(s):  
Stress Field ◽  
Flow Field ◽  
Constitutive Model ◽  
Displacement Field ◽  
Fem Analysis ◽  
Field Stress ◽  
Field Displacement ◽  
Seepage Model ◽  
Stress And Deformation

The seepage is the main reason of many excavation accidents. Currently, most of the excavation designs ignore the seepage function or pay little attention on it. This paper focuses on the excavation’s stress and deformation influenced by the unsteady seepage, leading into the Van Genuchten seepage model and the Hardening-Soil constitutive model. And compare and analyze the different influences of flow field, stress field, displacement field and force caused by the steady and unsteady seepage

Modeling of Stress Distribution in Dental Implant in Frontal Part of Mandible

2014 ◽  
Vol 606 ◽  
pp. 137-140
Author(s):  
Dušan Németh ◽  
Ján Kučera ◽  
František Lofaj ◽  
Vladimír Ivančo
Keyword(s):  
Stress Distribution ◽  
Stress Field ◽  
Dental Implant ◽  
Fem Analysis ◽  
Screw Thread ◽  
Bone Surface ◽  
Normal Position ◽  
Lower Stress ◽  
Frontal Part ◽  
Maximum Stresses

The aim of this work is the modeling of the stress distribution in cortical and trabecular bone of model frontal part of mandible by FEM analysis using linear static methods applying monocortical and bicortical fixation of dental implant. Depending on the position of the screw thread with regard to the bone surface, three different cases were simulated: exactly on the bone surface, 1,5 mm above and 0,5 mm below the surface of the cortical bone. It was found out that the stress field in the cortical part and the implant are considerably lower in the case of slightly recessed position in contrast with the above and normal position of the implant in both, monocortical and bicortical fixations. However, bicortical fixation in this case generates slightly lower stress field in the bone and implant parts than in monocortical fixation. Monocortical fixation is otherwise slightly more favorable from the viewpoint of maximum stresses in the bone in the case of exact and above positions of the implant.

scholarly journals FEM Analysis on the Effect of the Slip on Fatigue Damage in Wheel Tread with White Layer

2009 ◽  
Vol 58 (12) ◽  
pp. 1017-1022
Author(s):  
Ryota KONO ◽  
Hiroyuki AKEBONO ◽  
Masahiko KATO ◽  
Takanori KATO ◽  
Atsushi SUGETA
Keyword(s):  
Fatigue Damage ◽  
White Layer ◽  
Fem Analysis

scholarly journals A Parameter Sensitivity Analysis of the Effect of Rebar Corrosion on the Stress Field in the Surrounding Concrete

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Fangyuan Li ◽  
Wenya Ye
Keyword(s):  
Finite Element Method ◽  
Stress Field ◽  
Prestressed Concrete ◽  
Radial Displacement ◽  
Protective Layer ◽  
Fem Analysis ◽  
The Finite Element Method ◽  
Parameter Sensitivity Analysis ◽  
Ordinary Concrete ◽  
Rebar Corrosion

Rebar corrosion results in a change in the stress field in the surrounding concrete, which in turn accelerates the deterioration of the concrete structure. In addition to the protective layer, the compressive stress under which concrete is prestressed also affects the effect of corrosion-induced rebar expansion on the stress field in the concrete. The present study simulates the effect of corrosion-induced rebar expansion on the stress field in the concrete using the finite element method (FEM) by applying a virtual radial displacement to the product of corrosion-induced rebar expansion. Based on an analysis of the effect of multiple rebars on the stress field in ordinary concrete, stress distribution in the protective layer of the concrete is determined. Afterward, the locations where there is damage to the surface concrete caused by rebar corrosion are determined. After verifying the feasibility of the FEM analysis, the effect of corrosion-induced ordinary rebar expansion in a typical prestressed concrete segment is determined by analyzing the characteristics of corrosion-induced rebar expansion occurring in various prestressed concrete specimens.

FEM Analysis of Massive Concrete Pile Using of Cooling Pipe in Shahe Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1359-1363
Author(s):  
Jian Cheng Sun ◽  
Ya Jing Pang ◽  
Wen Zhong Zhao
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Temperature Gradient ◽  
Stress Field ◽  
Water Temperature ◽  
Fem Analysis ◽  
Massive Concrete ◽  
Cooling Pipe ◽  
Concrete Pile ◽  
Element Theory

Based on finite element theory,Study on temperatrue field under the using of cooling pipe for massive concrete pile in shahe bridge by using MIDAS/CIVIL.Analysis of various factors effect to the temperature field, stress field and the temperature gradient of massive concrete pile,which included in inlet water temperature and the water flow, proposed the control indicators of cooling pipe design.

scholarly journals FEM Analysis on Singular Stress Field of Ceramic/Metal Joint.

1994 ◽  
Vol 60 (577) ◽  
pp. 1935-1942 ◽  
Author(s):  
Fangyi Luo ◽  
Hideo Kobayashi ◽  
Haruo Nakamura ◽  
Takuya Sato
Keyword(s):  
Stress Field ◽  
Fem Analysis ◽  
Singular Stress ◽  
Metal Joint ◽  
Singular Stress Field

A Coupled Thermal Structural Finite Element Analysis of a Single Pulse Micro-EDM Process

2013 ◽  
Vol 579-580 ◽  
pp. 86-90
Author(s):  
Cheng Guo ◽  
Yu Kui Wang ◽  
Zhen Long Wang ◽  
Bao Cheng Xie
Keyword(s):  
Temperature Field ◽  
Thermal Stress ◽  
Stress Field ◽  
Structural Model ◽  
White Layer ◽  
Three Dimensional ◽  
Single Pulse ◽  
Discharge Process ◽  
Element Analysis ◽  
Thermal Stress Field

A three-dimensional coupled thermal structural model for micro electrical discharge is presented in this paper. Temperature field and thermal stress field of a single spark discharge process are analysed using this model by indirect coupling method. Temperature field is firstly solved which acts as the foundation of solving thermal stress field. To make the simulation results more reliable, these important elements are also taken into account, such as temperature-dependent properties of material, the phenomenon of plasma channel radius expanding, the percentage of discharge energy transferred to the workpiece and Gaussian distribution of heat flux. The results can explain the formation of cracks around the discharge crater. The thickness of the white layer and residual stresses can be predicated using this model.

Observation of secondary slip systems in tungsten bicrystals

1984 ◽  
Vol 42 ◽  
pp. 478-479
Author(s):  
J. R. Fekete ◽  
R. Gibala
Keyword(s):  
Stress Field ◽  
Grain Boundaries ◽  
Deformation Behavior ◽  
Stress Axis ◽  
Polycrystalline Materials ◽  
Slip Systems ◽  
Metallic Materials ◽  
Twist Boundary ◽  
Secondary Slip ◽  
Plane Normal

The deformation behavior of metallic materials is modified by the presence of grain boundaries. When polycrystalline materials are deformed, additional stresses over and above those externally imposed on the material are induced. These stresses result from the constraint of the grain boundaries on the deformation of incompatible grains. This incompatibility can be elastic or plastic in nature. One of the mechanisms by which these stresses can be relieved is the activation of secondary slip systems. Secondary slip systems have been shown to relieve elastic and plastic compatibility stresses. The deformation of tungsten bicrystals is interesting, due to the elastic isotropy of the material, which implies that the entire compatibility stress field will exist due to plastic incompatibility. The work described here shows TEM observations of the activation of secondary slip in tungsten bicrystals with a [110] twist boundary oriented with the plane normal parallel to the stress axis.

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