Belhocine Ali

Bio: Belhocine Ali is an academic researcher from University of Oran. The author has contributed to research in topics: Disc brake & Brake. The author has an hindex of 2, co-authored 2 publications receiving 25 citations.

Effects of material properties on generation of brake squeal noise using finite element method

Abstract: THIS PAPER IS CONCERNED WITH THE DISC BRAKE SQUEAL PROBLEM FOR PASSENGER CARS. THE OBJECTIVE OF THE PRESENT RESEARCH IS DEVELOPING A FINITE ELEMENT MODEL OF THE DISC BRAKE ASSEMBLY IN ORDER TO IMPROVE UNDERSTANDING OF THE INFLUENCE OF YOUNG€™S MODULUS ON SQUEAL GENERATION. A DETAILED FINITE ELEMENT MODEL OF THE WHOLE DISC BRAKE ASSEMBLY THAT INTEGRATES THE WHEEL HUB AND STEERING KNUCKLE IS DEVELOPED AND VALIDATED USING EXPERIMENTAL MODAL ANALYSIS. STABILITY ANALYSIS OF THE DISC BRAKE ASSEMBLY IS ACCOMPLISHED TO FIND UNSTABLE FREQUENCIES. A PARAMETRIC STUDY IS CARRIED TO LOOK INTO THE EFFECT OF CHANGING YOUNG€™S MODULUS OF EACH BRAKE COMPONENTS ON SQUEAL GENERATION. THE RESULTS OF SIMULATION INDICATED THAT YOUNG€™S MODULUS OF DISC BRAKE COMPONENTS PLAY A SUBSTANTIAL ROLE IN GENERATING THE SQUEAL NOISE.

Thermal Modeling of Disc Brake Rotor in Frictional Contact

Abstract: Safety aspect in automotive engineering has been considered as a number one priority in development of new vehicle Each single system has been studied and developed in order to meet safety requirement Instead of having air bag, good suspension systems, good handling and safe cornering, there is one most critical system in the vehicle which is brake systems The objective of this work is to investigate and analyze the temperature distribution of rotor disc during braking operation using ANSYS Multiphysics The work uses the finite element analysis techniques to predict the temperature distribution on the full and ventilated brake disc and to identify the critical temperature of the rotor The analysis also gives us, the heat flux distribution for the two discs

Thermo-Mechanical and Structural Performances of Automobile Disc Brakes: A Review of Numerical and Experimental Studies

Abstract: Disc brake system is one of the most critical components in a vehicle, which is always exposed to nonlinear transient thermoelastic conditions. Optimal design of a brake system to suit the heat transfer, weight and packing requirements is an ongoing challenge. Substantial researches have been carried out and are underway, in order to address the diverse issues related to thermal, mechanical and structural performances of automobile disc brakes. With the extensive application of numerical tools and techniques, the analyses involved became easier and effective. The present article provides an exhaustive review of the numerical and experimental studies reported so far, on the analysis and design of solid and ventilated disc brakes. The directions for future works are also described. The review reveals that, there is enough scope for extended research for realizing optimal design of disc brake system by truly emulating all the relevant practical situations.

FE prediction of thermal performance and stresses in an automotive disc brake system

Abstract: This study aims to identify thermal effects in the structure and the contact behavior of a disc-pad assembly using a finite element approach. The first analysis is performed on the disc-pad model in the absence of thermal effects. The structural performance of the disc-pad model is predicted in terms of factors such as the deformation and von Mises stress. Next, thermomechanical analysis is performed on the same disc-pad model with the inclusion of convection, adiabatic, and heat flux elements. The predicted temperature distribution, deformation, stress, and contact pressure are presented. The structural performance between the two analyses (mechanical and thermomechanical) is compared. For this contribution, we were able to find and use some experimental results on the contact pressure distributions inner brake pads to validate our thermomechanical model. This study can assist brake engineers in choosing a suitable analysis method to critically evaluate the structural and contact behavior of the disc brake assembly.

Optimization of stir–squeeze casting parameters for production of metal matrix composites using a hybrid analytical hierarchy process–Taguchi-Grey approach

Abstract: A hybrid optimization approach using analytical hierarchy process (AHP) combined with Taguchi-Grey has been developed and tested for the first time to optimize the stir–squeeze casting process para...

采用全联热-机械有限元模型计算盘式制动器尖叫声的预测工具(A Predictive Tool to Evaluate Disk Brake Squeal Using A Fully Coupled Thermo--Mechanical Finite Element Model)

Abstract: This paper presents a new integrated approach to the analysis of brake squeal modelling．It focuses on developing a validated thermo—mechanical finite element model by taking full account of the effect of thermal loading on the structural response of the brake．An integrated study involving time—dependent non—linear contact and a fully coupled transient thermal analysis are carried out to provide the contact and temperature distribution within the brake before executing an instability study using the complex eigenvalue technique．The results，in turn demonstrate the fugitive nature of brake squeal through the system eigenvalues that are extracted throughout the braking period. (摘要: 本文提出一个制动器尖叫模拟的新的综合方法, 它集中开发采用全考虑制动器结构响应热.负荷的影响的正确的热-机械有限元模型. 该综合研究包括实现与时间有关的非线性接触和全联.瞬态热分析, 在进行不稳定研究前, 采用复杂固有值技术, 提供在制动器内的接触和温度分布. 其结果依次通过制动全部系统固有值证实制动尖叫性质的变化.)