International Journal of Scientific and Research Publications, Volume 5, Issue 9, September 2015 1 ISSN 2250-3153 www.ijsrp.org Static and modal analysis of engine cover for different materials Harish Mugutkar, D Swetha Assistant Professor, Dept of Mechanical Engineering, Anurag Group of Institutions Abstract- The designed engine cover in this paper is made of different plastic materials, today’s ever increasing demand for newer, lighter materials with higher strength, greater stiffness, and better reliability has led to wide research on development of thermo plastic materials. These materials offer a combination of strength and modulus that are either comparable to or better than many traditional materials such as metals. However, with the development need for materials with superior properties from the private sector, composites are now making their way into more common applications. However study on the static and dynamic mechanical behaviour, long term durability, and environmental stability of these materials are limited. Under-the-bonnet applications came later with the more widespread availability of high-performance thermoplastics (referred to as ‘engineering plastics’) and contributed significantly to cost and weight reduction in the engine compartment. In the present work an attempt has been made to analyze the different composite materials for engine cover of vehicle with respect to static and modal analysis. Initially the engine cover model is prepared in catia software with actual dimensions. Analysis of engine cover model is done in ANSYS by importing the CATIA software model for 5 different materials and results for existing material are studied. The objective of present work is to suggest the best material for vehicle engine cover by comparing obtained results with present material. The various parameters of interest are natural frequency, total deformation and equivalent stress. Based on results obtained with the study of above parameters ideal material for engine cover is suggested. The major objectives are outlined as follows:- • Preparation of CAD model of engine cover using CATIA software. • Carrying out static analysis and modal analysis using ANSYS for 5 different materials and to compare the obtained results with existing material. • To obtain the mechanical properties viz equivalent stress, total deformation and modal frequencies of engine cover for different materials. • To compare the various parameters of interest and draw conclusion. Index Terms- Engine Cover, Deformation, Plastic Material. I. INTRODUCTION oday’s ever increasing demand for newer, lighter materials with higher strength, greater stiffness, and better reliability has led to wide research on development of thermo plastic materials. These materials offer a combination of strength and modulus that are either comparable to or better than many traditional materials such as metals. Because of their low specific gravities, the strength-to-weight ratios as well as specific modulus make these materials more superior to those of metallic materials. In addition, fatigue strength-to-weight ratios as well as fatigue damage tolerances of many polymers are excellent and make them feasible candidates for many applications. The use of advanced materials has primarily been limited to high performance aerospace and sporting applications. However, with the development need for materials with superior properties from the private sector, composites are now making their way into more common applications. However study on the static and dynamic mechanical behaviour, long term durability, and environmental stability of these materials are limited. Thermoplastics have been extensively used in automotive applications for the last few decades and are most visibly seen in automobile bumpers and interiors. Under-the-bonnet applications came later with the more widespread availability of high- performance thermoplastics (referred to as ‘engineering plastics’) and contributed significantly to cost and weight reduction in the engine compartment, initially in applications that could be regarded as less critical to performance and safety, such as cooling fans, shrouds and header tanks, fixations, radiator grills, etc. Recently it has been seen engineering plastics are used in critical components on the vehicle itself as well as into safety critical components such as brakes, steering and air bag systems. The driving force behind this trend has been the growing confidence of automotive engineers in the capabilities of thermoplastics and engineering plastics. Engineering plastics have performed very well in each new demanding application. This successfully has raised awareness about plastic materials. Beyond this automotive engineers also studied different characters to judge the thermo plastic materials. They suggested that their characteristics are quite different to those of the metals that have been used for generations. While this understanding has enabled innovation with thermoplastics, the drivers for change have been those familiar throughout the automotive industry: weight reduction, greater fuel economy and system cost reduction. The use of composite materials in various parts of automobile chassis component are shown in Fig1.1 .Thermoplastics are ideal materials to achieve these goals since they have specific gravities substantially lower than metals generally and the injection-moulding process lends itself to lower production costs through the ability to integrate complex parts into one component and the substantial reduction in finishing processes. T