AGGREGATE MULTI-INCLUSION INTERACTION AND INTERFACE INFLUENCE ON CONCRETE COMPRESSION BEHAVIOR

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Aylie Han ◽  
Buntara Sthenly Gan ◽  
Yanuar Setiawan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compression Strength ◽  
Tensile Behavior ◽  
Interfacial Transition Zone ◽  
Element Analysis ◽  
Compression Behavior ◽  
Inclusion Interaction ◽  
The Finite Element Analysis ◽  
The Relationship

The presence of the interfacial transition zone (ITZ) between aggregates and the mortar matrix in concrete has been studied extensively. A numerical and experimental study involving concrete specimens with multi-inclusions was conducted, and the ITZ was modeled as a cutoff bar in the finite element analysis, representing the shear and tensile behavior. The mortar specimens were sized 100 mm by 100 mm, with a thickness of 50 mm, and the inclusions were cylindrical aggregates with a diameter of 20.85 mm. The specimen was loaded in uniaxial compression. Two inclusion axes configurations were considered: parallel and perpendicular to the line of loading. The finite element analysis was performed assuming a 2D behavior. Further, the aspect of the distance between inclusions was studied. It was shown that, in general, the perpendicular arrangement resulted in a significantly higher compression strength when compared to the parallel formation. For both the parallel and perpendicular configuration, the relationship between the increase in the axis distance and the compression strength followed a quadratic path. First an increase in strength was observed, followed by a reduction, as the axis distance evolved. Additionally, it was shown that the ITZ area in tension initiated the failure of all specimens.

The Relationship between the Deformation of Spherical Indentation and Tensile Deformation

2016 ◽  
Vol 723 ◽  
pp. 363-368 ◽  
Author(s):  
P.M. Ogar ◽  
D.B. Gorokhov
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tensile Deformation ◽  
Spherical Indentation ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Plastic Sphere ◽  
Plastic Displacement ◽  
Definition Of ◽  
The Relationship

The paper is devoted to the definition of the deformation during indentation of the sphere and its relationship with the tensile deformation. Proposed by different authors methods of determining the deformation of the contact are considered. The results of their researches may vary significantly. It is shown that in the last decade to determine the deformation, the finite element analysis taking into account the "sink-in/pile-up", i.e. an elastic sinking in and plastic piling up of the material on the edges of the indent during the indentation process is widely used. The purpose of this research is to determine the relationship between tension deformation and sphere indentation deformation with taking into account the last achievements in the field of finite-element modeling of elastic-plastic sphere indentation. It is considered two methods of determining of deformation. One uses the equation proposed by S.I. Bulychev, in which the Mayer’s index is determined from the results of finite element analysis. The second method use the energy concept of hardness. It is based on the assumption that within the range of uniform deformation during uniaxial tension and during sphere indentation, the same energy is consumed to the plastic displacement of the part of the material volume out of limits of initial volume. They have close results. The corresponding graphic relations are shown.

scholarly journals Finite Element Analysis of the Size Effect on Ceramic Strength

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2885 ◽  
Author(s):  
Kyohei Takeo ◽  
Yuya Aoki ◽  
Toshio Osada ◽  
Wataru Nakao ◽  
Shingo Ozaki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Size Effect ◽  
Damage Model ◽  
Fracture Probability ◽  
Element Analysis ◽  
Weibull Statistics ◽  
Weakest Link ◽  
The Finite Element Analysis ◽  
The Relationship

The most prominent effect of the weakest link theory, which is used to derive the Weibull statistics of ceramic strength, is the size effect. In this study, we analyze the size effect on ceramic strength using the finite element analysis (FEA) methodology previously proposed by the authors. In the FEA methodology, the data of the microstructure distribution (i.e., relative density, size, and aspect ratio of the pore and the grain size) are considered as input parameters of a continuum damage model via a fracture mechanical model. Specifically, we examine five sizes of rectangular specimens under three types of loading conditions. Then, we simulate the fracture stresses of sets of 30 specimens under each size and loading condition and obtain the relationship between the scale parameter and effective volume using the Weibull distribution. The results suggest that the proposed FEA methodology can be applied to the analysis of the fracture probability of ceramics, including the size effect.

Study on Parametric Modeling Method for FEA Model of Periodic Symmetric Struts Support

2011 ◽  
Vol 462-463 ◽  
pp. 990-995
Author(s):  
Zhen Shi Li ◽  
Mamtimin Gheni ◽  
Lie Yu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Programming Language ◽  
Necessary Conditions ◽  
Parametric Modeling ◽  
Ansys Software ◽  
Element Analysis ◽  
Fea Model ◽  
The Finite Element Analysis ◽  
The Relationship

In this paper, the APDL programming language provided by ANSYS software is used to build the parametric modeling of Periodic Symmetric Struts Support (PSSS), which is provide convenience and necessary preparations for the Finite Element Analysis (FEA) and save much time and effort during the preprocess analysis. At first, the positional parameters and size parameters of PSSS are analyzed, and find out the relationship between main parameters, and identify the parameter equations. Then, build the struts support model and edit the parameter equations by APDL language. Finally, the producing process of different kind of struts support models are implemented by changing main parameters and provide the necessary conditions for preprocess of FEA.

Flexibility Analysis of the Welded Metal Bellows of Mechanical Seal

2011 ◽  
Vol 462-463 ◽  
pp. 894-899
Author(s):  
Mamtimin Gheni ◽  
Halida Musha ◽  
Nijiat Yusup ◽  
Kurban Baki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Loading Condition ◽  
Maximum Stress ◽  
Mechanical Seal ◽  
Element Analysis ◽  
Flexibility Analysis ◽  
The Finite Element Analysis ◽  
Metal Bellows ◽  
The Relationship

In this study, the stiffness and the flexibility of welded metal bellows of mechanical seal is studied numerically by changing the number of bellows membrane and the loading condition. The relationship between the number of membrane and the displacement, the stress and the flexibility are analyzed. For further improved the axial displacement, overall stiffness and the flexibility of the welded metal bellows membrane, the finite element analysis are conducted. The numerical results show that the maximum stress keeps constant value with increasing the number of bellows membrane under the same loading condition. The relationship between number of bellows membrane and stiffness as will as the flexibility are obtained. It is shown, stiffness is decreased and flexibility is increased with increasing of the number of the bellows membrane.

Finite Element Analysis of Bending Stress in the Meshing Process for Internal Gear Pairs with few Teeth Difference

2013 ◽  
Vol 764 ◽  
pp. 129-133
Author(s):  
Yan Gang Wei ◽  
Chun Xiao Gu ◽  
Xiu Juan Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Analysis ◽  
Gear Pair ◽  
Bending Stress ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Internal Gear ◽  
The Relationship ◽  
Meshing Process

According to the transmission characteristics of the internal gear pair with few teeth difference, the models of finite element analysis are established reasonably after combining the principle of gear engagement, contact mechanics, and finite element concept and method. The relationship between the simulation model of finite element and the meshing process is made clearly. The simulation analysis is performed subtly for the meshing process of the internal gear pair using the finite element analysis method. The main factors of multi-pair teeth meshing effect have been shown and the effect of multi-pair teeth meshing on the gear bending stress is analyzed.

scholarly journals New approach for getting better accuracy with mesh dependent material properties

2018 ◽  
Vol 9 ◽  
pp. A2
Author(s):  
Qiu-Ping Zhou ◽  
Hua Ding
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Material Properties ◽  
Optimal Solution ◽  
Mesh Size ◽  
Element Analysis ◽  
New Approach ◽  
The Finite Element Analysis ◽  
The Relationship

Based on the relationship between finite element (FE) solution and mesh size, a new approach based on mesh depending on the material properties is proposed to make the finite element analysis results more efficient and more close to the optimal solution. This optimal solution is often evaluated either by experiment or by finite element method (FEM). At the opposite of the accuracy obtained by sensitivities analysis of the FEM which requires time-consuming, our approach allows getting the optimal meshing based on the material properties.

The Stress Distortion Analysis of Coiler Mandrel Based on Pro/E-MECHANICAL

2011 ◽  
Vol 80-81 ◽  
pp. 975-979
Author(s):  
Yun Cai Zhao ◽  
Fang Ping Hu ◽  
De Lang Guo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
External Diameter ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Steel Rolling ◽  
Distortion Analysis ◽  
The Finite Element Analysis ◽  
The Relationship

Basing on material mechaanics and the finte element method,the interrelated analysis modules of Pro/E-MECHANICAL is used to analysis the stress and distortion of the coiler mandrel,getting the weakness of the coiler mandrel and getting the location of the maximum stress and the relationship between steel rolling external diameter and stress distortion, Obtaining the maximum stress is 82.8 Ma,the maximum displacement is 0.56 mm and getting the main reason for coiler mandrel published.Basing on the finite element analysis to improve its structure, to make its service life prolong greatly.

Interactive Graphics for the Analysis of Tires

1985 ◽  
Vol 13 (3) ◽  
pp. 127-146 ◽  
Author(s):  
R. Prabhakaran
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Approximate Solutions ◽  
Interactive Graphics ◽  
Element Analysis ◽  
Analysis Process ◽  
Physical Problems ◽  
The Finite Element Analysis ◽  
Analysis Computer ◽  
Discretization Technique

Abstract The finite element method, which is a numerical discretization technique for obtaining approximate solutions to complex physical problems, is accepted in many industries as the primary tool for structural analysis. Computer graphics is an essential ingredient of the finite element analysis process. The use of interactive graphics techniques for analysis of tires is discussed in this presentation. The features and capabilities of the program used for pre- and post-processing for finite element analysis at GenCorp are included.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

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