International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 07 Issue: 08 | Aug 2020
p-ISSN: 2395-0072
www.irjet.net
Design and Analysis of Leaf Spring by using Composite Material Ajahar Sayyad1, Rahul Kulkarni2, Alimoddin Patel3, Umesh Jadhav4 1M.Tech
Student Dept. of Mechanical Engg. College of Engineering Osmanabad, Maharashtra, India Dept. Of Mechanical Engg. College of Engineering Osmanabad, Maharashtra, India 3Professor Dept. Of Mechanical Engg. College of Engineering Osmanabad, Maharashtra, India 4Professor Dept. Of Mechanical Engg. College of Engineering Osmanabad, Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------not well controlled and results in stiction in the motion of Abstract - Composite materials are extensively used in many 2Professor
engineering applications due to high strength and stiffness to weight ratio. The objective is to compare the stresses, deformations and weight saving of composite leaf spring with that of steel leaf spring. The design constraint is stiffness. The Automobile Industry has great interest for replacement of steel leaf spring with that of composite leaf spring, since the composite materials has high strength to weight ratio, good corrosion resistance. The material selected was glass fiber reinforced polymer (E-glass/epoxy) is used against conventional steel. The design parameters were selected and analyzed with the objective of minimizing weight of the composite leaf spring as compared to the steel leaf spring. The Automobile Industry has great interest for replacement of steel leaf spring with that of composite leaf spring, the composite materials has high strength to weight ratio, good corrosion resistance. In this paper, the design and analysis a composite leaf spring and compared with a standard steel leaf spring. The materials selected are Epoxy glass, Epoxy carbon, Aluminum Alloy, Titanium Alloy is used against conventional steel leaf spring. The design parameters are selected and analyzed with the objective of comparing Stress, Deformation, Elastic Strain and Weight of the composite leaf spring as compared to conventional steel leaf spring. The leaf spring was modeled in CATIA and the analysis was done in ANSYS software.
Key words - Steel Leaf Spring, Composite, Epoxy, Automobile, Composite Leaf Spring.
1. INTRODUCTION Originally called laminated or carriage spring, a leaf spring is a simple form of spring, commonly used for the suspension in wheeled vehicles. It is also one of the oldest forms of springing, dating back to medieval times. The advantage of leaf spring over helical spring is that the end of the springs may be guided along a definite path. Sometimes referred to as a semi-elliptical spring or cart spring, it takes the form of a slender arc-shaped length of spring steel of rectangular cross-section. The center of the arc provides location for the axle, while tie holes are provided at either end for attaching to the vehicle body. For very heavy vehicles, a leaf spring can be made from several leaves stacked on top of each other in several layers, often with progressively shorter leaves. Leaf springs can serve locating and to some extent damping as well as springing functions. While the interleaf friction provides a damping action, it is Š 2020, IRJET
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Impact Factor value: 7.529
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the suspension. For this reason manufacturers have experimented with mono-leaf springs.
Figure – 1.1: A traditional leaf spring arrangement. A leaf spring can either be attached directly to the frame at both ends or attached directly at one end, usually the front, with the other end attached through a shackle, a short swinging arm. The shackle takes up the tendency of the leaf spring to elongate when compressed and thus makes for softer springness.There were a variety of leaf springs, usually employing the word "elliptical". "Elliptical" or "full elliptical" leaf springs referred to two circular arcs linked at their tips. This was joined to the frame at the top center of the upper arc; the bottom center was joined to the "live" suspension components, such as a solid front axle. Additional suspension components, such as trailing arms, would be needed for this design, but not for "semi-elliptical" leaf springs as used in the Hotchkiss drive. That employed the lower arc, hence its name. "Quarter-elliptic" springs often had the thickest part of the stack of leaves stuck into the rear end of the side pieces of a short ladder frame, with the free end attached to the differential, as in the Austin Seven of the 1920s. As an example of non-elliptic leaf springs, the Ford Model T had multiple leaf springs over its differential that was curved in the shape of a yoke. As a substitute for dampers (shock absorbers), some manufacturers laid nonmetallic sheets in between the metal leaves, such as wood.
2. LITERATURE REVIEW M. M. Patunkar, et al. Vinkel Arora, et al.[1] in their work has done design and analysis of conventional mono leaf spring standard eye end and casted eye end. CAD modeling was done in CATIA and analysis was done in ANSYS under similar loading conditions for parameters like deformation,
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