scholarly journals Thermomechanical behavior of dry contacts in disc brake rotor with a grey cast iron composition

2013 ◽  
Vol 17 (2) ◽  
pp. 599-609 ◽  
Author(s):  
Ali Belhocine ◽  
Mostefa Bouchetara
Keyword(s):  
Ventilation System ◽  
Thermomechanical Behavior ◽  
Transient Temperature ◽  
Brake Disc ◽  
Dry Contact ◽  
Simulation Strategy ◽  
Grey Cast ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Braking Phase

The main purpose of this study is to analysis the thermomechanical behavior of the dry contact between the brake disc and pads during the braking phase. The simulation strategy is based on the calculation code ANSYS11. The modeling of transient temperature in the disk is actually used to identify the factor of geometric design of the disk to install the ventilation system in vehicles. The thermal-structural analysis is then used coupling to determine the deformation established and the Von Mises stresses in the disk, the contact pressure distribution in pads. The results are satisfactory compared to those found in the literature.

scholarly journals Structural and Thermal Analysis of Automotive Disc Brake Rotor

2014 ◽  
Vol 61 (1) ◽  
pp. 89-113 ◽  
Author(s):  
Ali Belhocine ◽  
Mostefa Bouchetara
Keyword(s):  
Ventilation System ◽  
Von Mises Stress ◽  
Transient Temperature ◽  
Brake Disc ◽  
Disc Brake ◽  
Contact Pressure Distribution ◽  
Dry Contact ◽  
Simulation Strategy ◽  
Von Mises ◽  
Braking Phase

Abstract The main purpose of this study is to analyze the thermomechanical behavior of the dry contact between the brake disc and pads during the braking phase. The simulation strategy is based on softawe ANSYS11. The modeling of transient temperature in the disc brake is actually used to identify the factor of geometric design of the disc to install the ventilation system in vehicles. The thermal-structural analysis is then used with coupling to determine the deformation established and the Von Mises stress in the disc, the contact pressure distribution in pads. The results are satisfactory compared to those of the specialized literature.

Finite Element Analysis of Automotive Disk Brake and Pad in Frictional Model Contact

2015 ◽  
Vol 5 (4) ◽  
pp. 32-62 ◽  
Author(s):  
Belhocine Ali
Keyword(s):  
Computer Code ◽  
Shear Stresses ◽  
Good Prediction ◽  
Element Analysis ◽  
Disk Brake ◽  
Mechanical Study ◽  
Dry Contact ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Braking Phase

The object of this work is to present a study of the thermomechanical behavior of the automobile disc brake during the braking phase. Then, a purely mechanical study of dry contact between the disc and pads is developed with a good prediction becomes a major stake for the industrialists while modeling the loading and the boundary conditions around the disc. The same computer code was used to visualize displacements, total deformations in the disc, shear stresses, Von Mises stresses and, the tools of contact pads. Also studied was the case of thermoelasticity while interpreting the various exits results during this simulation.

Transient Simulation of a Gas Turbine Disk Incorporating Heat Pipes Under Structural Aspects

2015 ◽  
Author(s):  
Sina Eisenmann ◽  
Roman Körner ◽  
Andreas Hupfer
Keyword(s):  
Heat Pipe ◽  
Heat Pipes ◽  
Turbine Disk ◽  
Transient Temperature ◽  
Stress Concentrations ◽  
Disk Radius ◽  
Induced Stress ◽  
Startup Process ◽  
Von Mises ◽  
Von Mises Stresses

This paper investigates the results of a transient FEM simulation of a generic and simplified turbine disk with incorporated heat pipes under thermal and rotational loads. Therefore a startup process of the high temperature heat pipe from the frozen state is modeled by local variation of temperature-dependent material properties. Transient temperature distributions along the heat pipe and inside the turbine disk are investigated. Furthermore, the time dependent von Mises stresses as well as the temperature-induced stress components are evaluated over the disk radius and at the high loaded disk bore. By using the heat pipe, the temperature at the disk rim is reduced after a short time. During the startup process there is a short term increase of the von Mises stresses up to 2% at the high loaded disk bore. Furthermore there are heat pipe induced stress concentrations which reach high transient values.

scholarly journals Effect of Slotted holes on performance of Disc Brake

2018 ◽  
Vol 8 (01) ◽  
Author(s):  
Ch.Indira Priyadarsini
Keyword(s):  
Thermal Stresses ◽  
Heat Fluxes ◽  
Brake Disc ◽  
Disc Brake ◽  
Disk Brake ◽  
Rotor Design ◽  
Dry Contact ◽  
Transient Thermal ◽  
Braking Phase ◽  
Ansys Workbench

The disc brake is a device for slowing or stopping the rotation of a wheel. Repetitive braking of the vehicle leads to heat generation during each braking event. Transient Thermal Analysis of the Rotor Disc of Disk Brake is aimed at evaluating the performance of disc brake rotor of a car under severe braking conditions and there by assist in disc rotor design and analysis. Disc brake model and analysis is done using ANSYS workbench 16.0. The main purpose of this study is to analysis the thermo mechanical behaviour of the dry contact of the brake disc during the braking phase. The coupled thermal-structural analysis is used to determine the thermal stresses and to calculate the Heat fluxes in x-y-z planes. This is established Slotted type and analysis is done by taking two different components such as Cast Iron and Stainless Steel and comparing which material is best suited for making of a disc brake.

DESIGN AND THERMAL ANALYSIS OF BRAKE ROTOR WITH DIFFERENT MATERIALS

2020 ◽  
Vol 15 (2) ◽  
Author(s):  
Sugunarani S ◽  
Santhosh V
Keyword(s):  
Temperature Distribution ◽  
Heat Dissipation ◽  
Brake Disc ◽  
Element Analysis ◽  
Analysis Techniques ◽  
Engineering Software ◽  
The Finite Element Analysis ◽  
Brake Rotor ◽  
Grey Cast ◽  
Aluminium Metal

This work deals with the analysis of heat generation and dissipation in the disc brake of a car during braking and the following release period by using computer-aided engineering software for three different materials of the rotor disc and brake pad. The objective of this work is to analyze the temperature distribution of rotor disc during operation using COMSOL Multiphysics. The work uses the finite element analysis techniques to calculate and predict the temperature distribution on the brake disc and to identify the critical temperature of the brake rotor disc. Conduction, convection and radiation of heat transfer have been analyzed. The results obtained from the analysis indicates that different material on the same retardation of the car during braking shows different temperature distribution. A comparative study was made between grey cast iron (GCI), Aluminium Metal Matrix Composite (AMMC), Alloy steel materials are used for brake disc and the best material for making brake disc based on the rate of heat dissipation have been suggested.

Impact of mandibular prognathism on morphology and loadings in temporomandibular joints

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jingheng Shu ◽  
Quanyi Wang ◽  
Desmond Y.R. Chong ◽  
Zhan Liu
Keyword(s):  
Finite Element Analysis ◽  
Pearson Correlation ◽  
Morphological Parameters ◽  
Element Analysis ◽  
Mandibular Prognathism ◽  
Temporomandibular Joints ◽  
Pearson Correlation Analysis ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Asymptomatic Subjects

AbstractLoadings in temporomandibular joints (TMJs) are essential factors in dysfunction of TMJs, and are barely noticed in treatment of maxillofacial deformity. The only approach, which can access stresses in TMJs, could expend day’s even weeks to complete. The objective of the study was to compare the differences of the morphological and biomechanical characteristics of TMJs between asymptomatic subjects and patients with mandibular prognathism, and to preliminarily analyze the connection between the two kinds of characteristics. Morphological measurements and finite element analysis (FEA) corresponding to the central occlusion were carried out on the models of 13 mandibular prognathism patients and 10 asymptomatic subjects. The results indicated that the joint spaces of the patients were significantly lower than those of the asymptomatic subjects, while the stresses of patients were significantly greater than those of asymptomatic subjects, especially the stresses on discs. The results of Pearson correlation analysis showed that weak or no correlations were found between the von Mises stresses and the joint spaces of asymptomatic subjects, while moderate, even high correlations were found in the patients. Thus, it was shown to be a feasible way to use morphological parameters to predict the internal loads of TMJs.

scholarly journals Interior-stress fields produced by a general axisymmetric punch

Friction ◽  
2021 ◽  
Author(s):  
Longxiang Yang ◽  
Zhanjiang Wang ◽  
Weiji Liu ◽  
Guocheng Zhang ◽  
Bei Peng
Keyword(s):  
Hankel Transform ◽  
Elastic Half Space ◽  
Stress Fields ◽  
Dual Integral Equations ◽  
Total Load ◽  
Interior Stress ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Relationship Of ◽  
Analytical Expressions

AbstractThis work is a supplement to the work of Sneddon on axisymmetric Boussinesq problem in 1965 in which the distributions of interior-stress fields are derived here for a punch with general profile. A novel set of mathematical procedures is introduced to process the basic elastic solutions (obtained by the method of Hankel transform, which was pioneered by Sneddon) and the solution of the dual integral equations. These processes then enable us to not only derive the general relationship of indentation depth D and total load P that acts on the punch but also explicitly obtain the general analytical expressions of the stress fields beneath the surface of an isotropic elastic half-space. The usually known cases of punch profiles are reconsidered according to the general formulas derived in this study, and the deduced results are verified by comparing them with the classical results. Finally, these general formulas are also applied to evaluate the von Mises stresses for several new punch profiles.

Mechanics of Composite Layered Rough Medium in Contact

2013 ◽  
Vol 703 ◽  
pp. 200-203
Author(s):  
Shao Biao Cai ◽  
Yong Li Zhao
Keyword(s):  
Material Properties ◽  
Three Dimensional ◽  
Shear Stresses ◽  
Normal Loading ◽  
Layered Coatings ◽  
Pressure Profiles ◽  
Tangential Traction ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Tangential Friction

This study presents a first attempt to develop a numerical three-dimensional multilayered (more than 2 composite layered coatings) elasticperfectly plastic rough solids model to investigate the contact behavior under combined normal loading and tangential traction. Contact analyses are performed to study the effects composite thin film layers. Local contact pressure profiles, von Mises stresses, and shear stresses as a function of material properties and applied normal and tangential friction loads are calculated.

scholarly journals Reconstruction of Severe Acetabular Bone Defect with 3D Printed Ti6Al4V Augment: A Finite Element Study

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Jun Fu ◽  
Ming Ni ◽  
Jiying Chen ◽  
Xiang Li ◽  
Wei Chai ◽  
...  
Keyword(s):  
Finite Element ◽  
Yield Strength ◽  
Bone Defect ◽  
Cancellous Bone ◽  
Acetabular Bone ◽  
Fea Model ◽  
Acetabular Bone Defect ◽  
3D Printed ◽  
Von Mises ◽  
Von Mises Stresses

Purpose. The purpose of this study was to establish the finite element analysis (FEA) model of acetabular bone defect reconstructed by 3D printed Ti6Al4V augment and TM augment and further to analyze the stress distribution and clinical safety of augments, screws, and bones.Methods. The FEA model of acetabular bone defect reconstructed by 3D printed Ti6Al4V augment was established by the CT data of a patient with Paprosky IIIA defect. The von Mises stresses of augments, screws, and bones were analyzed by a single-legged stance loading applied in 3 increments (500 N, 2000 N, and 3000 N).Results. The peak von Mises stresses under the maximal loading in the 3D printed augments, screws, and cortical bone were less than the yield strength of the corresponding component. However, the peak stress in the bone was greater than the yield strength of cancellous bone under walking or jogging loading. And under the same loading, the peak compressive and shear stresses in bone contact with TM augment were larger than these with 3D printed augment.Conclusions. The FEA results show that all the components will be intact under single-legged standing. However, partial cancellous bone contacted with 3D printed augment and screws will lose efficacy under walking or jogging load. So we recommend that patients can stand under full bearing, but can not walk or jog immediately after surgery.

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