Yatesh Patil, Subim Khan, Shoaib Iqbal, Amol Bankar and Maheshwari Patil
The Finite Element Analysis (FEA) is widely used for solving many Engineering problems. This paper focuses on use of FEA for Brake Squeal Analysis. Automobiles generates several kinds of noises like Groan, chatter, judder, moan, and squeal. Brake squeal can be defined as an unwanted noise that occurs due to dynamic instability of the system. It generally occurs in the frequency range of 1 KHz to 16 KHz.The aim of the project is to predict the squeal noise occurring at particular frequencies at an early stage of development using full corner brake model. The preprocessing of the full corner brake model is done using Hypermesh while the processing and post-processing is to be carried out by using Abaqus. Analysis uses non-linear static simulation which is followed by Complex Eigen Value (CEA) extraction for carrying out the squeal Simulation. It provides the relation between damping ratio and frequency (Real part of the complex Eigen value). If the damping ratio at any particular frequency is above one, it can be said that squeal will occur at that particular frequency.
B.V. Omidiji, B.O. Malomo, A. Aronsoro and D.A. Adetan
A green sand moulding system was applied to produce alumunum alloy bimetallic castings. Al alloys 6101 and 242 were combined in the production of the bimetals. Mould firing temperature, pouring temperature and grain fineness number taken at three levels were the parameters used in the study. This was done to know the number of times the experiments would be run using L9 orthogonal array of Taguchi’s approach to design of experiment. Nine experiments were conducted in all, taking into cognisance the role of design of gating system for each of the castings to avoid turbulence. UTS and hardness values were determined as core mechanical properties of the components. There was a down trend of the values as the values of the process parameters increased. However, there were exceptions to this pattern of behaviour perhaps some hot spots were in the castings that exhibited the kind of behaviour.
Shailesh D. Ambekar, Vipin K. Tripathi
The aim of the study is to do an experimental analysis and investigation of visco-elastic behaviour of CFRP hybrid nanocomposites, which contains the small percentage of nanoclay and nanoZnO particles mixed for the improvement in the various properties of the CFRP composites. Also there is try to focus on the combined effect of another variable, i.e., fiber angle of orientation along with changing the percentage of nano particles.A hand layup method followed by process of vacuum bagging was used to make the samples of composite. Dynamic mechanical analyzer (DMA) was used to inspect the dynamic mechanical properties of CFRP hybrid nanocomposite specimens with changing temperature. The OVAT analysis is carried out for three mentioned variables and studied effect of variables on the various visco elastic properties like flexural storage modulus, loss modulus, Glass transition temperature and tan etc. It is found that due to the presence of nano particles there is tremendous change in the value of storage modulus ,it gets almost doubled, i.e., 200%because of the presence of nano particles. The experimental result also shows the positive effect on the loss modulus because of the nano particle contribution .Similarly there is considerable change in GTT(Glass transmission temperature) and change in length in DMA (Dynamic mechanical analysis ).
M.A. Mohite, B. S. Kothavale
An estimation of the spur gear service life and crack path analysisis proposed in this paper. Ip theory using numerical solution is used to find the fatigue crack propagation rate, service life, and crack path due to bending fatigue. A spur gear of tumbler gear mechanism of lathe machine,is implemented for this analysis. An experimental test on gear specimens was carried out to analyze the crack propagation due to fatigue. Besides, service life estimated by the theory was compared with the most common Paris law. Hence further,extended finite element approach (Ansys)is implemented for the simulation of gear crack propagation trajectory. The simulation results are verified with experimental test.The service life and crack trajectory of the gear is obtained with ‘Ip’ theory and found in good agreement with experiment.In overall, this study signifies the gear failure prediction methodology during crack propagationin respect of life cycles and trajectory path.
Poornima R. Bodke, Subim .N. Khan, Shoaib Iqbal, Aravind S.
The study of dynamic behavior of Electric Power Steering System (EPAS) is very critical to understand the overall handling of the vehicle. The appropriate feedback from the steering to the driver is crucial so that the driver get the precise steering feel in order to control the vehicle with ease during all kinds of maneuvers. For a maximum tire life, the steering system should maintain, a proper tire road contact, and proper tire geometry with respect to the chassis both during cornering and straight-ahead driving. The driver should be able to turn the vehicle with ease during low as well as high speed maneuver. A complete steering system dynamic model is developed and is integrated with the full vehicle model using AMESIM 1D simulation platform. The simulation is carried out as per the guidelines laid by the ISO 7401 standard criterion. In this project we have performed the simulation on three different vehicle models in which a behavioral comparison of EPAS between their Conventional & Electric variants is performed. A thorough implementation of various vehicle SPMM parameters and KnC files is done in AMESim simulation model. Finally a list of Performance Aggregate Target Parameters is calculated. The resulting PAT parameter values are then compared with the test data and an appropriate design modification has been suggested accordingly.
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