Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

The automobile industry is making huge strides to improve vehicle and occupant safety. A lot of safety improvements and modifications have been made in the past decade. But the side impact is still overlooked as not much has been improved for side safety despite most of the accidents and collisions happen to the side of a vehicle. Door intrusion barriers are the primary protection feature along with A, B and C pillars. Crashworthiness mainly depends on the position, cross-section and material of the intrusion barrier. So, our work mainly focuses on finding the optimum position, choosing the correct cross-section and finding the right material for the intrusion barrier. The objective of this project is to minimize the damage to the side of the vehicle by increasing its crashworthiness thereby reducing passenger injuries. A model of a vehicle door has been designed in Solid Works and various cross sections of door intrusion barriers like circular, rectangular, H-section, I section, E and C section have been developed. The crash test has been conducted according to New Car Assessment Program (NCAP) norms and the best possible configuration with highest safety level has been found. The barrier developed successfully reduced deformation by 36.667% and was subjected to a much lesser stress which was 28% lower than the existing barriers. © 2019 SAE International. All Rights Reserved.

VIT Unitversity

Department of Design and Automation

School of Mechanical Engineering

Vellore Campus

Department of Automotive Engineering

SAE Technical Paper Series

Vehicle Side Safety Enhancement through Door Intrusion Barrier Analysis and Recuperation

In this study, the numerical investigation on the traverse vibration responses of the non-uniform composite plates is performed using a finite element method. The First-order shear deformation theory (FSDT) is used to formulate the governing differential equations of motion of various non-uniform composite plates. The material damping effects are included in the formulation by including material properties as a complex elastic modulus in terms of storage modulus and loss modulus. The dynamic response of various non-uniform configurations under harmonic forced excitation is studied and the design guidelines are provided to identify the suitable non-uniform composite configurations. © 2019 Elsevier Ltd. All rights reserved.

World University root node

Materials Today: Proceedings

Numerical investigation on transverse vibration responses of non-uniform composite plates

This study investigates the optimal locations of magnetorheological elastomer (MRE) segments in partially treated tapered composite MRE sandwich plates to maximize the natural frequencies and the loss factors. Various partially treated tapered composite MRE sandwich plate configurations are developed by dropping-off the plies longitudinally in top and bottom orthotropic (composite) layers with uniform core layer thickness. The core layer is made of natural rubber and MRE. The classical laminated plate theory is used to derive the governing differential equations of motion of the various partially treated MRE tapered composite sandwich plate configurations. The equations of motion are solved by using finite element formulation. Various cases of optimization problems are formulated and solved using genetic algorithm (GA) in order to obtain optimal locations to yield maximum natural frequencies and loss factors corresponding to the first five modes. The proposed methodology is validated by comparing the results evaluated in identifying optimal locations of MR fluid pockets filled in between uniform composite face layers, available in literature. It is observed that according to the user/designer requirements on achieving the optimal functions and their maximum value, the optimal locations of MRE pockets vary. It has also been demonstrated that the end conditions of the sandwich plate could play an important role in identifying the optimal locations of the MRE pockets. Further, it is observed that the optimal locations of MRE pockets are influenced by the ply drop off and resin locations. Hence it is concluded that the efficient design layout of a partially treated tapered composite MRE sandwich plate configurations would provide the guidelines for the designer to control the vibration effectively. © 2018

Composite Structures

Structural optimization of tapered composite sandwich plates partially treated with magnetorheological elastomers

In current scenario the usage of composite beams has increased tremendously in many engineering fields and industrial work environment. These beams experience high vibrations in factories and manufacturing industries. It is one of the serious problems that need to be addressed because it results in loss of stability of a system ultimately leading to failure. To control the vibration the mathematical model of the beam is required. However it is difficult to develop the model analytically, so we perform modal analysis using solid works. The response from modal analysis is extracted into matlab environment. The state space modal of the beam is developed in matlab. The control loop is developed in Simulink using Pid controller and commonly used blocks. Negative feedback mechanism is used in the control loop. The Pid controller is tuned to get optimum control of vibration. It is visualized that there is significant amount of reduction in vibration using scope. © IAEME Publication.

International Journal of Mechanical Engineering and Technology

Active vibration control of composite beam

The present paper proposes comparative study between Double Wish-Bone and Macpherson Suspension system. The objective is achieved by using ANSYS simulation package. Dynamic and static loads are applied on the suspension systems. Various analysis such as Structural analysis with static as well as dynamic loading, Modal analysis and Transient analysis are carried out in order to study deflection, stress, frequency and strain of both the suspension systems and a thorough comparative study is accomplished. © 2017 Published under licence by IOP Publishing Ltd.

Fulltext

IOP Conference Series: Materials Science and Engineering

Comparative study between double wish-bone and macpherson suspension system

International Journal of Engineering Research and Applications

Active Vibration Control of Laminated Composite Plates by using External Patches

In the present study, the dynamic performance of the sandwich plate with magneto rheological elastomer (MRE) as the core layer and tapered laminated composite plates as the face layers is investigated. Various MRE tapered laminated composite sandwich plate models are formulated by dropping-off the plies longitudinally in top and bottom composite layers to yield tapered plates as the face layers and uniform MRE layer as the core layer. The governing equations of motion of tapered composite MRE sandwich plates are derived using classical laminated plate theory and solved numerically. Further, silicon based MRE is being fabricated and tested to obtain the shear and loss moduli using MR rheometer. The efficacy of the finite element formulation is validated by carrying out experiments on the various prototypes of tapered composite silicon based MRE sandwich plates and comparing the results in terms of natural frequencies obtained at various magnetic fields with those obtained numerically and with available literature. Also, the effects of magnetic field, taper angle of the top and bottom layers, aspect ratio, ply orientations and various end conditions on the various dynamic properties of tapered laminated composite MRE sandwich plate are investigated. Further, the transverse vibration responses of three different tapered composite MRE based sandwich plates under harmonic force excitation are analyzed at various magnetic fields. © 2016 IOP Publishing Ltd.