International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 09 | Sep 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1834 REVIEW PAPER ON BELLEVILLE SPRING THROUGH NUMERICAL AND SIMULATION APPROACH Ritika Bhamore 1 , Purushottam Kumar Sahu 2 1 Research Scholar BM College of Technology, Indore 2 Associate Professor BM College of Technology, Indore ------------------------------------------------------------------------***------------------------------------------------------------------- Abstract - In present work an standard Belleville spring is considered for numerical analysis of force with respect to its maximum displacement of twice that of its height the results obtained are quite satisfying the one which are proposed by Almen J O [1] in 1936 and is modelled in CATIA v5r12 software and then further analysed in ANSYS 14.0 simulation software. For proper analysis the displacement is provided to the upper edge of the spring and rest all directions for that edge are fully constrained. The base edges are also provided with fully constrained motion in vertical direction but having free boundary condition in rest of the directions. The results in form of reaction force are then obtained through ANSYS solver. For validation 4 different cases of different height to thickness ratio are considered which are h/t=0.4, h/t=0.7, h/t=1.4, h/t-2.83 respectively. It is then concluded that FEA results are in good agreement with the numerically obtained data and can be considered for this kind of application in future too. Different graphs representing load-deflection curves are drawn and percentage deviation of FEA results with respect to numerical results are studied and summarized in conclusion. Keywords— Belleville Spring, FEA, CATIA, ANSYS, Load deflection curves, h/t ratio. INTRODUCTION A. Definition The Belleville spring, or disk spring, is a truncated shallow conical shell of uniform thickness. It may Be. Simpler to think of it as an annular plate that has been dished s1ighy into the shape of a cone. Such a spring is shown in Figure 1.1 Figure 1.1: Belleville spring The Belleville spring is usually loaded only at its edges by circumferentially uniform loads, axial in direction and with a sense such that they tend to reduce the cone angle. In most cases the edges are completely free to move. However, certain applications require that either the outer edge be restrained from radial expansion, as would be the case if the spring were inserted in a cylinder, or that the inner edge be restrained from radial contraction, as would be the case if a shaft were inserted through the spring. Some applications may require that both of these restrictions be imposed. B. Characteristics of Belleville Springs The simplest type of spring, a prismatic tension specimen, exhibits a characteristic which is typical of structural members in the elastic range: a linear load deflection curve. Accordingly, the helical spring, the volute spring, the ring spring, and most common springs have a straight relationship between load and deflection. On the other hand, Belleville spring usual1y have a nonlinear relationship between load and deflection, and it is possible to design Belleville springs with many differently shaped load deflection curves. By varying the fundamental parameters, it is possible to obtain positive, zero, and even negative spring rates in given portions of the load deflection curve. Most authorities report that the most important parameter in varying the shape of the load -deflection curve is the ratio of the free cone height, d, to the shell thickness, h. For values of d/h near 2.0, a curve such as that labeled "A" in "Fig. 2 will occur. Figure 1.2 Force deflection curve of Belleville spring This curve demonstrates the characteristic which is a result of instability of the cone as the cone angle is