Analyzing the Contacting Stresses of Ball in Servo Disc Brake

2013 ◽  
Vol 419 ◽  
pp. 280-285
Author(s):  
Jin Yue Tian ◽  
Zheng Ning Ren ◽  
Jin Wei Wang ◽  
Jin Yu Yao ◽  
Shi Xin Lan ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Theoretical Analysis ◽  
Contact Stress ◽  
Contact Surface ◽  
Optimization Design ◽  
Three Dimensional ◽  
Elastic Displacement ◽  
Disc Brake ◽  
Ball Bearings

The ball's stress distribution in tractor servo disc brake usually is three dimensional in tractor. In this article,the contact theoretical analysis is used to calculate the contact face action distribution between the saddle ball bearings, the elastic displacement, train and stress distributed situation was determined in contact surface. The results show that the method is completely feasible, this method was suitable similarly for the solution contact stress question, the data has provided the important reference for the contact face optimization design.

Analysis and Inversion of Contact Stress for the Finite Thickness Neo-Hookean Layer

2018 ◽  
Vol 85 (10) ◽  
Author(s):  
Heng Yang ◽  
Xue-Feng Yao ◽  
Shen Wang ◽  
Yu-Chao Ke ◽  
Sheng-Hao Huang ◽  
...  
Keyword(s):  
Contact Stress ◽  
Contact Surface ◽  
Finite Thickness ◽  
Three Dimensional ◽  
Image Correlation ◽  
Rubber Layer ◽  
Inverse Approach ◽  
Element Simulation ◽  
Loading Modes ◽  
Nonlinear Finite Element Simulation

In this paper, the theoretical analysis and the inversion of the contact stress on the finite thickness rubber contact surface with the friction effect are investigated. First, an explicit expression of deformation and stress on the surface of rubber under a rigid spherical indenter is developed by means of theoretical model, dimensional analysis, and nonlinear finite element simulation. Second, the inverse approach for obtaining the contact stress on the finite thickness rubber contact surface is presented and verified theoretically. Also, the displacement, the stress field, and the friction coefficient are obtained by means of three-dimensional digital image correlation (3D DIC) method. Finally, the applicability to other hyperelastic models, general boundary conditions, and loading modes are discussed. The results will provide an important theoretical and experimental basis for evaluating the contact stress on the finite thickness rubber layer.

The Interface Boundary Conditions for Bolted Flanged Connections

1976 ◽  
Vol 98 (4) ◽  
pp. 277-282 ◽  
Author(s):  
J. C. Thompson ◽  
Y. Sze ◽  
D. G. Strevel ◽  
J. C. Jofriet
Keyword(s):  
Stress Distribution ◽  
Contact Stress ◽  
Plate Theory ◽  
Contact Region ◽  
Three Dimensional ◽  
Surface Region ◽  
Prestressing Force ◽  
Flange Thickness ◽  
Interface Boundary Conditions ◽  
Contact Stress Distribution

In most bolted connections, the unknown interface pressure distribution and the extent of the contact region are essential parameters in any stress analysis. Concerning these parameters, experimental and numerical studies of a model of an isolated single-bolt region show the following. The contact region between the flanges depends almost exclusively on the ratio of the flange thickness to the diameter of the surface region of each flange over which the bolt prestressing force is distributed; the contact zone is virtually independent of both the level of prestressing force and of the size of the bolt hole; and the contact stress distribution for a typical range of parameters is very closely approximated by a truncated conical distribution. The studies also delineate the regions of the flanges around each bolt where the stress state is strongly three-dimensional and regions where simple plate theory is applicable. The relationships established between the contact stress distribution and the various geometric parameters are presented in a form immediately applicable by designers.

Contact Stress Analysis of Multilayered Strands

2011 ◽  
Vol 130-134 ◽  
pp. 1230-1233 ◽  
Author(s):  
Xin Ze Zhao ◽  
Wei Peng ◽  
Shao Qing Zhang ◽  
Ming Song Yang
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Contact Zone ◽  
Contact Stress ◽  
Contact Surface ◽  
Gaussian Quadrature ◽  
Arbitrary Point ◽  
Fretting Wear ◽  
Adjacent Layer ◽  
Analytical Expressions

The calculation method of contact force in contact-zone between adjacent layer wires has been analyzed. The principal radii of curvatures of wires were taken into consideration while obtaining the analytical expressions for contact stesses and sizes of contact surface. Meanwhile, a formular for shear stress of arbitrary point in half-space under contact-zone was derived on basis of the Boussinesq problem and it was simplified by using Gaussian quadrature. According to the results, the stress distribution could be unsderstood more thoroughly and the results is of great importance for studying looseness, fatigue and fretting wear of multilayered strands.

Influence of the TMJ Implant Geometry on Stress Distribution

2012 ◽  
Vol 488-489 ◽  
pp. 991-995 ◽  
Author(s):  
Zohreh Arabshahi ◽  
Jamal Kashani ◽  
Mohammed Rafiq Abdul Kadir ◽  
Abbas Azari
Keyword(s):  
Stress Distribution ◽  
Temporomandibular Joint ◽  
Contact Surface ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Surface Region ◽  
Implant Design ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Applied Loading

The purpose of this study was to investigate the influence of Temporomandibular Joint implant geometry on stress distribution in total reconstruction of temporomandibular joint. A three dimensional model of a lower jaw of a patient was developed from a Computed Tomography scan images. Anatomical curvature and flat contact surface of implant design and fixation screws were modeled. Two implanted mandibles were then compared by means of finite element analysis. The muscle forces for incisal clenching were applied. The equivalent stress resulted in contact surface region of the bone and implant and in fixation screw holes were investigated to evaluate the designs. In applied loading condition, The results showed that anatomical design of implant was more preferred and it will lead to long-term success of implant.

Research on Buckling Mechanism of U Type Steel Support’s Pinnas Based on ANSYS

2012 ◽  
Vol 466-467 ◽  
pp. 1271-1274
Author(s):  
Jian Zhuang Liu ◽  
Jia Li ◽  
Li Gan ◽  
Fang Fang Du
Keyword(s):  
Stress Distribution ◽  
Cross Section ◽  
Coal Mine ◽  
Optimization Design ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Type Steel ◽  
Buckling Failure ◽  
Simulation Results ◽  
Three Dimensional Models

The prevenient mechanical research on U type steel support focuses on two dimensional analysis in the installing plan. Interested in the buckling failure of U type steel support’s pinnas in one coal mine of Huainan Group, the authors build three dimensional models to stimulating 25U and 29U support. The appealing simulation results verify ANSYS’s 3-D computational capabilities about complicated section support. The main objective of their investigation has been to obtain some knowledge of the mechanism, stress distribution, and load magnitude in the support’s deforming. Further, the deviating longitudinal load play an accelerating deformation role on its distorting, which should be paied more attention to cross-section optimization, design of support parameters, and installing way of steel lacing.

An Analysis of Circular Bolted Flanged Joints on Solid Round Bars Subjected to External Bending Moments

2000 ◽  
Author(s):  
Toshiyuki Sawa ◽  
Tsuneshi Morohoshi ◽  
Akihiro Shimizu
Keyword(s):  
Stress Distribution ◽  
Contact Stress ◽  
Three Dimensional ◽  
Bending Moment ◽  
Theory Of Elasticity ◽  
Load Factor ◽  
Bending Moments ◽  
Sealing Performance ◽  
Contact Stress Distribution ◽  
Good Agreement

Abstract In designing bolted joints, it is important to know the contact stress distribution which governs the clamping effect or the sealing performance and to estimate the load factor (the ratio of an increment in axial bolt force to an external load) from bolt design standpoint. The clamping force by bolts and the external bending moment are axi-asymmetrical loads and not many investigations have seen reported which treat axi-asymmetrical. In this paper, the clamping effect, and the load factor for the case of solid round bars with circular flanges, subjected to external bending moments, are analyzed as an axi-asymmetrical problem using the three-dimensional theory of elasticity. Experiments were carried out concerning the contact stress distribution, and the load factor for the external bending moment (a relationship between an increment in axial bolt force, and external bending moment). The analytical results were in fairly good agreement with the experimental ones.

Analysis of Cord-Reinforced Poly-Rib Serpentine Belt Drive With Thermal Effect

2005 ◽  
Vol 127 (6) ◽  
pp. 1198-1206 ◽  
Author(s):  
G. Song ◽  
K. Chandrashekhara ◽  
W. F. Breig ◽  
D. L. Klein ◽  
L. R. Oliver
Keyword(s):  
Stress Distribution ◽  
Contact Stress ◽  
Three Dimensional ◽  
Single Layer ◽  
Material Model ◽  
Element Model ◽  
Shear Angle ◽  
Velocity Variation ◽  
Serpentine Belt ◽  
Contact Stress Distribution

This paper investigates the operation of an automotive poly-rib serpentine belt system. A three-dimensional dynamic finite element model, consisting of a driver pulley, a driven pulley, and a complete five-rib V-ribbed belt, was created. Belt construction accounts for three different elastomeric compounds and a single layer of reinforcing cords. Rubber was considered incompressible hyperelastic material, and cord was considered linear elastic material. The material model accounting for thermal strains and temperature-dependent properties of the rubber solids was implemented in ABAQUS∕EXPLICIT code for the simulation. A tangential shear angle and an axial shear angle were defined to quantify shear deformations. The shear angles were found to be closely related to velocity variation along contact arc and the imbalanced contact stress distribution on different sides of the same rib and on different ribs. The temperature effect on shear deformation, tension and velocity variation, and contact stress distribution was investigated and shown in comparison to the results for the same system operating at room temperature.

Study of Three-Dimensional Stress Distribution and Damage Characterization of Bolt Composite Joint

2006 ◽  
Vol 324-325 ◽  
pp. 395-398
Author(s):  
Yong Shou Liu ◽  
Xiao Jun Shao ◽  
Zhu Feng Yue
Keyword(s):  
Stress Distribution ◽  
Normal Stress ◽  
Contact Stress ◽  
Three Dimensional ◽  
Element Model ◽  
Matrix Cracking ◽  
Damage Initiation ◽  
Composite Joint ◽  
Fiber Matrix ◽  
Matrix Shear

A 3D finite element model of bolt composite joint has been established to determine the stress distribution on the contact surface. The effects of clamping torque and friction on the contact stress and interlaminar normal stress are considered. From the analysis results, contact stress is bared mainly by the 0° layer. The distribution and magnitude of contact stress are conducted by friction. The effect of clamping torque on interlaminar normal stress is very strong. A 3D damage user subroutine is added to the FEM to simulate the damage of joint. By the means of damage simulation, the initiation and progression direction of three types damage are predicted. Matrix cracking and fiber-matrix shear occur at first, and fiber buckling is founded subsequently. The matrix cracking and fiber-matrix debonding initiate at circumferential angle 45°and 135°, and fiber buckling initiate at the 0° layer on the bearing plane. The friction and bolt clamping torque can restrain damage initiation and development.

An Analytical Model for Predicting Contact Stress and Sliding Wear of a Three-Dimensional Textured Surface

2009 ◽  
Author(s):  
Elon J. Terrell ◽  
C. Fred Higgs
Keyword(s):  
Stress Distribution ◽  
Stress Analysis ◽  
Analytical Model ◽  
Contact Stress ◽  
Sliding Wear ◽  
Flat Surface ◽  
Three Dimensional ◽  
Textured Surface ◽  
Two Dimensional ◽  
Contact Stress Distribution

In this paper, an analytical model for predicting the contact stress and wear distribution between a textured surface and a compliant flat is presented. The modeling formulation is based upon a two-dimensional stress analysis of the flat, and it allows the contact stress distribution to be found from the distribution of the sample deflection into the flat surface. The wear evolution was calculated from the contact stress.

Variations in Contact Stress Distribution of Real Rough Surfaces During Running-In

1993 ◽  
Vol 115 (4) ◽  
pp. 602-606 ◽  
Author(s):  
Xian Liang ◽  
Ji Kaiyuan ◽  
Ju Yongqing ◽  
Chen Darong
Keyword(s):  
Plastic Deformation ◽  
Stress Distribution ◽  
Contact Stress ◽  
Dimensionless Parameter ◽  
Gradual Increase ◽  
Rough Surfaces ◽  
Three Dimensional ◽  
Stress Distributions ◽  
Exponential Form ◽  
Contact Stress Distribution

A numerical model for the elastic contact of three-dimensional real rough surfaces has been developed and applied to the study of the variations in contact stress distribution in running-in process. The specimens for calculation and experiment are washers with nominally flat grinding surfaces. The stresses of real contact between specimens at each stage of running-in are calculated and the contact stress distributions are given. It is shown that the contact stress distribution is in an exponential form which could be characterized by one dimensionless parameter: λ, the index of contact stress distribution. The proportion of plastic deformation β may be expressed as a function of λ. The results of the present work confirm the reasonableness of the early opinion that the running-in process can be considered as a gradual increase in the elastic component of deformation of the contact area and a decrease in the proportion of plastic deformation.

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