Effect of Clearance on Thermodynamic Characteristics of Woven Liner Spherical Plain Bearing

2014 ◽  
Vol 668-669 ◽  
pp. 164-167 ◽  
Author(s):  
Ming Qiu ◽  
Chuang Chuang Duan ◽  
Long Chen ◽  
Ying Chun Li ◽  
Ren Song Hu
Keyword(s):  
Mechanical Property ◽  
Thermal Properties ◽  
Maximum Stress ◽  
Friction Pair ◽  
Thermodynamic Characteristics ◽  
Plain Bearing ◽  
Carry Capacity ◽  
Finite Element Software ◽  
Analysis Process ◽  
Spherical Plain Bearing

The mechanical property of woven liner spherical plain bearing in different clearance has been analyzed using the finite element software. It indicated that when the positive clearance of woven liner spherical plain bearing is 100um, the maximum stress of its inner ring is the lowest. The position of the maximum stress is in the middle of the inner ring. That makes the bearing has a bigger carry capacity. Based on above analysis, the thermal properties between the friction pair of woven liner spherical plain bearing which clearance is 100um is also analyzed. The node temperature variation trend of inner ring and liner along with the analysis process is obtained.

Stress Distribution Behavior of Spherical Plain Bearing Fabricated by TiAl-Based Composite Materials Based on the Finite Element Analysis

2014 ◽  
Vol 1061-1062 ◽  
pp. 649-652
Author(s):  
Jing Wang ◽  
Li Ying Yang ◽  
Shou Ren Wang ◽  
Guang Ji Xue ◽  
Chang Xiu Zhou
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Composite Materials ◽  
Bearing Steel ◽  
Plain Bearing ◽  
Element Analysis ◽  
Specific Strength ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Spherical Plain Bearing

Spherical plain bearing is a sliding bearing have a spherical contact surface,it can bear larger load and automatically adjusted to the self-alignin. TiAl-based composite material is a material that be used to lightweight spherical plain bearing. The Simulation used the finite element software Ansys for the bearing’s static analysis.The material of outer ring using normal bearing steel, one group used the TiAl-based composite materials as the material of the inner ring, Another group the inner ring material is bearing steel 9Cr18. The law of the stress and strain produced by the two groups is consistent,the deformation of the composite materials is bigger under the same load, its elasticity modulus and density is smaller compared to the ordinary bearing steel,the composite material has the advantages of high specific strength especially in the occasions have strict requirements of the bearing weight.

Implementation of p and h-p Versions of the Finite Element Method

1992 ◽  
Author(s):  
Ye-Chen Lai ◽  
Timothy C. S. Liang ◽  
Zhenxue Jia
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Elastic Analysis ◽  
Two Dimensional ◽  
The Finite Element Method ◽  
Shape Functions ◽  
Linear Elastic ◽  
Finite Element Software ◽  
Analysis Process ◽  
Adaptive Analysis

Abstract Based on hierarchic shape functions and an effective convergence procedure, the p-version and h-p adaptive analysis capabilities were incorporated into a finite element software system, called COSMOS/M. The range of the polynomial orders can be varied from 1 to 10 for two dimensional linear elastic analysis. In the h-p adaptive analysis process, a refined mesh are first achieved via adaptive h-refinement. The p-refinement is then added on to the h-version designed mesh by uniformly increasing the degree of the polynomials. Some numerical results computed by COSMOS/M are presented to illustrate the performance of these p and h-p analysis capabilities.

scholarly journals Force Transfer and Stress Distribution in an Implant-Supported Overdenture Retained with a Hader Bar Attachment: A Finite Element Analysis

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Preeti Satheesh Kumar ◽  
Kumar K. S. Satheesh ◽  
Jins John ◽  
Geetha Patil ◽  
Ruchi Patel
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Maximum Stress ◽  
Alveolar Bone ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Finite Element Software ◽  
Force Transfer ◽  
Edentulous Mandible

Background and Objectives. A key factor for the long-term function of a dental implant is the manner in which stresses are transferred to the surrounding bone. The effect of adding a stiffener to the tissue side of the Hader bar helps to reduce the transmission of the stresses to the alveolar bone. But the ideal thickness of the stiffener to be attached to the bar is a subject of much debate. This study aims to analyze the force transfer and stress distribution of an implant-supported overdenture with a Hader bar attachment. The stiffener of the bar attachments was varied and the stress distribution to the bone around the implant was studied. Methods. A CT scan of edentulous mandible was used and three models with 1, 2, and 3 mm thick stiffeners were created and subjected to loads of emulating the masticatory forces. These different models were analyzed by the Finite Element Software (Ansys, Version 8.0) using von Mises stress analysis. Results. The results showed that the maximum stress concentration was seen in the neck of the implant for models A and B. In model C the maximum stress concentration was in the bar attachment making it the model with the best stress distribution, as far as implant failures are concerned. Conclusion. The implant with Hader bar attachment with a 3 mm stiffener is the best in terms of stress distribution, where the stress is concentrated at the bar and stiffener regions.

Wing-Fuselage Lug Stress Prediction Using Finite Element Method

2013 ◽  
Vol 393 ◽  
pp. 317-322
Author(s):  
Abdul Malik Hussein Abdul Jalil ◽  
Wahyu Kuntjoro
Keyword(s):  
Finite Element ◽  
Load Distribution ◽  
Applied Load ◽  
Maximum Stress ◽  
Finite Element Models ◽  
Finite Element Analyses ◽  
Finite Element Software ◽  
Stress Prediction ◽  
Reaction Forces ◽  
The Individual

This paper describes the methodology to predict the stress level that occurs at the wing-fuselage lugs (joints). The finite element models of the wing, the wing lugs and the fuselage lugs were developed. Finite Element Analyses were performed using NASTRAN finite element software. CQUAD4 and BAR2 elements were used to represent the individual structures of the wing such as the ribs and stringers. The applied load was based on the symmetrical level flight condition. Once the load distribution acting at the wing had been calculated and applied, reaction forces at the nodes representing the wing lugs were obtained and these values applied to the lug models where the maximum stress value acting at the lugs was obtained.

Investigation of Friction Temperature in Railway Disc Brake

2012 ◽  
Vol 479-481 ◽  
pp. 202-206
Author(s):  
Wan Hua Nong ◽  
Fei Gao ◽  
Rong Fu ◽  
Xiao Ming Han
Keyword(s):  
Finite Element ◽  
Contact Pressure ◽  
Friction Pair ◽  
Brake Disc ◽  
Finite Element Software ◽  
Disc Surface ◽  
Friction Temperature ◽  
Steel Disc ◽  
Braking Force ◽  
Braking Process

The distribution of temperature on the rubbing surface is an important factor influencing the lifetime of a brake disc. With a copper-base sintered brake pad and a forge steel disc, up-to-brake experiments have been conducted on a full-scale test bench at a highest speed of 200 Km/h and a maximum braking force of 22.5 KN. The temperature distributions on brake disc surface have been acquired by an infrared thermal camera, and the contact pressure on the contact surface of the friction pair has been calculated by the finite element software ABAQUS. The results show that the area and thermal gradient of the hot bands increase with the increase of braking speed and braking force. The hot bands occur in priority at the radial location of r=200 mm and r=300 mm, and move radially in the braking process. The finite element modelling calculation indicates that the distribution of the contact pressure on the disc surface in radial direction is in a "U"-shape. The maximum contact pressure occur at the radial locations of r=200 mm and r=300 mm, and the minimum contact pressure occur in the vicinity of the mean radius of the disc. The conformity of contact pressure distributions with the practical temperature evolutions indicates that the non-uniform distribution of the contact pressure is the factor resulting in the appearance of hot bands on the disc surface.

Simulation Analysis on Strength of Bucket Tooth with Various Soil

2012 ◽  
Vol 619 ◽  
pp. 62-65 ◽  
Author(s):  
Ying Ying Zhang ◽  
Fan He ◽  
Cheng Long Li ◽  
Yang Gao ◽  
Peng Gao
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Large Scale ◽  
Maximum Stress ◽  
Simulation Analysis ◽  
Solid Model ◽  
Finite Element Software ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamics Method ◽  
Simulation Results

This paper applies large-scale finite element software ANSYS and the module of LS-DYNA to establish the solid model of bucket teeth, and according to Smoothed Particle Hydrodynamics Method (SPH) establishes the soil constitutive model. Emulating the process that bucket teeth excavate soil of three different grade ruggedness coefficients obtains the stress and statistical value of bucket tooth point; Simulation results show that: the stress concentration of bucket teeth point is more serious. When the ruggedness coefficient is0.6< f <1.0, the corresponding maximum stress is 197 ~ 309MPa, which meets the strength requirement .The damage is caused by the fatigue failure.

Turning Thermal Deformation Analysis of Aluminum Alloy Spherical Plain Bearing Outer Ring

2014 ◽  
Vol 556-562 ◽  
pp. 733-737
Author(s):  
Yan Jun Li ◽  
Bao Fu Li
Keyword(s):  
Aluminum Alloy ◽  
Element Model ◽  
Outer Ring ◽  
Deformation Analysis ◽  
Machining Accuracy ◽  
Plain Bearing ◽  
Axial Deformation ◽  
Machining Error ◽  
Deformation Law ◽  
Spherical Plain Bearing

Against the problem of large machining error and low productivity of aluminum alloy spherical plain bearing, the paper is concentrated on building finite element model in MATLAB to research the radial and axial deformation law under various cutting conditions with theories of heat transfer, isoparametric element and functional variational method, providing theoretical and data support to enhance machining accuracy of spherical plain bearing outer ring.

Studies on the Mechanical Property of Ring Nugget Formed in Sheet to Tube Joining

2011 ◽  
Vol 291-294 ◽  
pp. 819-822
Author(s):  
Cai Ping Liang ◽  
Fang Fang Sun ◽  
Xiao Hang Liu
Keyword(s):  
Mechanical Property ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Maximum Stress ◽  
Failure Criteria ◽  
Weld Strength ◽  
Automobile Manufacturing ◽  
Resistance Spot ◽  
Vehicle Structure ◽  
Ring Spot

Single sided resistance spot welding (SSRSW) developed from resistance spot welding (RSW) is a feasible plan to join vehicle structure to closed-form tube and is increasingly used in automobile manufacturing. A ring spot weld can be formed between the two workpieces during this process. The weld strength is critical to the performance of vehicle. The mechanical property of the ring nugget, however, is lack of attention. In this study, a simulation model of workpieces with ring nugget for tensile-shear test was established and the stress and strain distributions around the weld were researched in detail. It was found that the maximum stress is generally concentrated at the out edge around the ring nugget. The failure region, however, may be in the heat affected zone (HAZ) instead of in the place of maximum stress, which should be judged by stress failure criteria (SFC) in the model. In addition, the tensile stress and shear stress on the surface of the lower sheet and upper tube were illustrated.

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