Deflection of master leaf steel by analyzing the design, it was found that all the. Analysis and modification of leaf spring of tractor. Rodge we know that the spring plays very essential part of every automobile for suspension point of view. Keywords leaf spring, finite element analysis and composite materials, composite leaf springs. It is concluded that bonded joints prevent delamination of leaf spring. Malikoutsakis proposed the design and optimization procedure for parabolic leaf springs. Static structural analyses of the both conventional and tapered leaf springs are carried out. Static and fatigue analysis of multi leaf spring used in the. A leaf spring is a simple form of spring commonly used for the suspension in wheeled vehicles.
Pdf analysis of mono leaf spring ijset journal academia. In the finite element modeling, every leaf was modeled with eightnode 3d brick elements solid 45 and then fivenode 3d contact elements contact 49 were used to represent contact and. Reducing weight while increasing or maintaining the strength of products is getting to be highly important. So this fixed eye end of the leaf spring cannot move in. Composite materials are one of the material families which are attracting researchers and being solutions of. Use of leafspring plates lsp01 or lsp02 is recommended. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. The automobile industry has a great interest for replacement of steel leaf spring with that of composite leaf spring, the objective is to compare the stresses and a weight saving of composite leaf spring with that of steel leaf spring since the composite materials have a high strength to. Information in table 2 is not sufficient to design a composite leaf spring. Static and fatigue analysis of multi leaf spring used in. Leaf springs are commonly used in the vehicle suspension system and are subjected to millions of varying stress cycles leading to fatigue failure.
Design and analysis of leaf spring semantic scholar. Ideally they car would sit about 1 higher as it did about 20 years ago. For this purpose, a rear leaf spring for mahindra modelcommander 650 di is considered. Stock plates will not accept our largerdiameter ubolts. Introduction leaf springs are mainly used in suspension systems to absorb shock loads in automobiles like light motor vehicles, heavy duty trucks and in rail systems. A finite element approach for analysis of multi leaf spring using cae tools research journal of recent sciencesvol 1,292,96feb 2012. The fe model of the leaf spring has been generated in catia v5 r17 and imported in ansys11 for finite element analysis, which are most popular cae tools. G scholar, mechanical engineering, ips college of technology management.
Explore design, analysis, fabrication and testing of a composite leaf spring with free download of seminar report and ppt in pdf and doc format. Leaf springs are plays a major role in the automobile industry. Since fixed support has restriction to move in x and y direction as well as rotation about that fixed point. Unlike coil springs, leaf springs also locate the rear axle, eliminating the need for trailing arms and a pan hard rod, thereby saving cost and weight in a simple live. Design and analysis of composite leaf spring suspension.
Keywords leaf spring, stress analysis, dynamic load. Design and analysis of composite leaf spring international journal of mechanical and industrial engineering ijmie, issn no. It absorbs automobile vibrations, shocks and loads by springing action and to. From the results of static analysis of steel leaf spring, it is seen the displacement of leaf spring is 53. Finite element analysis has been carried out to determine natural frequencies and mode shapes of the leaf spring by considering road surface mode.
The advantage of leaf spring over helical spring is that the ends. A threelayer composite leaf spring with full length leave made of eglassepoxy composite material has been used. Design and analysis of eglassepoxy composite monoleaf. The result of finite element method is verified with experimental and. In this analysis, the load acting on the leaf spring is considered as a fluctuating load varying from positive to negative with mean component of stress equal to zero.
The total load acting on the leaf spring is distributed to act equally at each end of the eye cross section of the leaf spring. Fea analysis of composite leaf spring for automotive vehicle. Leafspring bushings total control leafspring, polyurethanebushing sets provide a more stable interface between the leaf springs and the chassis. The 260page strategic report provides critical insights on the automotive leaf spring market size, share, trend, forecasts, and opportunity analysis. Although extensive analysis of the parallel leaf spring flexure has been reported in the past 2 and socalled rules of thumb exist 1, they are generally restricted by the assumption that the length over width ratio of the leaf springs is large so shearing effects do not need to be taken into leaf spring reinforcement notch hinge leaf spring. In fact they are made blunt or even made straight to increase the load bearing capacity. They were originally called carriage or laminated springs. Single leaf steel springs, called mono leaf, are used on some vehicles. A comparative study has been made between composite and steel leaf spring with respect to weight, cost and strength. The benefit of leaf spring over helical spring is that the ends of the spring may be leaded along a definite path as it deflects to act as a structural. We manufacture compression springs, extension springs, torsion springs, wire forms and stamped metal parts in addition to a variety of precision metal components.
International journal of engineering trends and technology. Even though various types of springs are available in the market. Paszek performed a three dimensional contact analysis of the car leaf spring. Rodge, journalinternational journal of scientific research in science, engineering and technology, year2018, volume4. Failure analysis of semielliptical master leafspring of. The truck multileaf tandem leaf spring is modelled in creo parametric 2. The input geometry was drawn in solidworks with result parameters. Comparison of steel and composite leaf spring using ansys v17. Originally called a laminated or carriage spring, and sometimes referred to as a semielliptical spring, elliptical spring, or cart spring, it is one of the oldest forms of springing, appearing on carriages in england after 1750 and from there migrating to france and germany.
Leaf spring failure analysis springs are a limited life component. Design and analysis of leaf spring global journals inc. The experimental results verified the analytical and the finite element solutions. Suspension system, leaf spring, heavy commercial vehicle, vibration analysis. A variable rate can be accomplished with a leaf spring suspension by providing contacts on the mount that effectively. They considered static three dimensional contact problem of the leaf car spring and the solution is obtained by finite element method performed in adina 7. This manual is written as a guide for the designer of leaf spring installations. Finite element analysis will be carried out considering existing conventional steel leaf spring of a light commercial vehicle with a proper material properties and element types, to get natural. As per the static analysis on 8leafs we can concluded that eglass epoxy is better. Pdf leaf springs are special kind of springs used in automobile suspension systems. Assembly services, design assistance, prototype services, low volume production, high volume. Design and analysis of leaf spring using various composites.
The advantages of leaf spring over helical spring is that the ends of the spring be guided along a definite path as it deflects to act as a structural member in addition to energy absorbing device. All the calculations were done using the version 5. Same dimensions are used in composite multi leaf spring using s2 glassepoxy and kevlarepoxy unidirectional laminates. Comparative stress, deflection and fatigue analysis performed on different steel and composite leaf spring models by many researchers using. A leaf spring is a simple type of suspension spring commonly used in heavy duty vehicles. Colt diesel truck is a small capasitytruck with the container tub on rear of its part. Bonded end joint mono composite leaf spring is investigated for failure and fabricated.
A finite element structural analysis of the front and rear leaf spring models under the y direction load was analysed with various thickness by using ansys software. Leaf spring market report research, industry analysis. Leaf spring is a suspension system for vehicles that has been used as far back as medieval times. My primary objective is to eliminate much of my spring wrap. I have a 3 block between the spring and the axle to adjust the ride height. Sowjanya, design and analysis of automotive multi leaf spring using composite material. Leaf spring modeling niklas philipson modelon ab ideon science park se22370 lund, sweden niklas. In general springs are used to absorb shocks and to prevent the vibrations. Being able to capture the leaf spring characteristics is of signi. Reducing weight while increasing or maintaining strength of products is getting to be highly important research issue in this modern world. Multileaf spring and hotchkiss suspension cae simulation.
Fluctuating analysis on leaf spring of a mini load carrier. Static and dynamic analysis of 3d model of conventional leaf spring is performed using ansys 10. A leaf spring is a simple form of spring, commonly used for the suspension wheeled vehicles. It is seen that the maximum bending stress is about 450. Regardless of how well a spring is maintained or how favorable the operating conditions are, all springs will eventually fail from fatigue caused by the repeated flexing of the spring. A single or mono leaf spring is usually tapered to produce a variable spring rate. It contains information which will make it possible to calculate the space required for a leaf spring, to provide suitable attachments, and to determine the elastic and geometric properties of the assembly. A steel leaf spring used in the rear suspension of light passenger cars was analyzed by two analytical and finite element methods. Leaf sprigs are crucial suspension elements used on light passenger vehicle. This paper presents detailed finite element modeling and analysis of a twostage multileaf spring, a leaf spring assembly, and a hotchkiss suspension using abaqus. For over a century newcomb spring has manufactured the highest quality parts.
The analysis has been conducted by using ansys12 software with the help of static structural tool. So, a stress analysis was performed using finite element method. Once the spring life limit is reached a fatigue failure will or has occurred. Analysis and optimization of a composite leaf spring.
This work deals with replacement of conventional steel leaf spring with composite leaf spring. Leaf springs are used in heavy load vehicle where load is much larger than in passenger vehicles, they are used in vehicles which are limited to varying cycles stress to millions thus eventually leads to failure of fatigue. Theyobtained the deflection and stress results and compared their results with analytical and. Nonlinearity from large deformation, interleaf contact, and friction was included. The suspension leaf spring is one of the potential. G scholar, mechanical engineering, ips college of technology management 2 hod, mechanical engineering, ips college of technology management, gwalior mp india email. Multidisciplinary analysis concept for the development of a. Stresses and strains under different loads were analyzed.
Paper open access failure analysis of the leaf spring of. Pdf design and analysis of leaf spring semantic scholar. The stress analysis of half cantilever master leaf of leaf spring with and without extra full length leave is carried out. The leaf spring was modeled in autocad 2012 and the analysis was done using ansys 9. Design and analysis of composite leaf spring by using fea and. The suspension of leaf spring is the area which needs to focus to improve the suspensions of the vehicle for comfort ride. In analysis part the finite element of leaf spring is modelled. Leaf spring is the simplest form of spring used in the suspension system of vehicle. Evaluation of a leaf spring failure continued submitted july 18, 2005. The leaf spring, which we are analyzing, is a custom designed leaf spring with different eyes like viz.
Static analysis of leaf spring article pdf available. A c program is used to design the spring, cae analysis is performed in ansys these results are then used to compare to on field tests. Leaf spring design and engineering strength of materials. The dimensions of an existing conventional steel leaf spring of a light commercial vehicle are taken and are verified.
Multidisciplinary analysis concept for the development of a composite adaptive leaf spring p. Ansys workbench tutorial video automobile leaf spring. I am currently thinking of relocating the front spring perches farther back and selecting different leaf springs. Sep 26, 2014 fea of leaf spring used for suspension, performed using ansys software and demonstrated impact of changing material studied. Leaf springs are used for rear suspensions on cars and many light trucks. Pdf design and analysis of leaf spring with composite materials. Jeevan kumar 39 leaf springs are unique kind of springs used in abstract automobile suspension systems. The spring is produced by means of hot forming such as hot rolling depend on the expected specification of spring function manufactured 2. Design and analysis of composite leaf spring by using catia and ansys bandi manasa1,r. The suspension leaf spring is one of the potential items for weight reduction automobile as it.
Pdf design, analysis and optimization of leaf spring. Expired lifetime application number us424116a inventor archibald f weise original assignee. Design, analysis, fabrication and testing of a composite. This project describes design and experimental analysis of composite leaf spring made of glass fiber reinforced polymer. Design and analysis of composite leaf spring by using fea. Its system has been tried and true, primarily used on almost all vehicles up to the 1970s and still today on trucks and vans that haul heavy loads. The present paper deals with the design and analysis of composite leaf spring. Hufenbach institute of lightweight engineering and polymer technology, tu dresden, dresden, 07, germany. Generally the springs are designed to absorb and store energy when load is applied after the load is removal it will regain its. Where, e, f, l, b and hrepresent the youngs modulus, normal. In new light commercial vehicle development, engine is mounted at rear to have low engine noise and vibration inside cabin. The dimensions of an existing conventional steel leaf spring of a light commercial vehicle are taken and are verified by design calculations.
Comparison of steel and composite leaf springs using fea by. Design and analysis of a leaf spring for automobile. Failure analysis of semielliptical master leaf spring of passenger car using finite element method. The steel leaf spring was replaced with an optimized composite one. This paper shows detail study about vibration analysis of leaf spring.
Use of leaf spring plates lsp01 or lsp02 is recommended. Leaf spring is an automotive components produced from high carbon steel as its raw material c 0. Design and structural analysis of leaf spring tarun kumar 1, g. Leaf spring, ask latest information, abstract, report, presentation pdf,doc,ppt,leaf spring technology discussion,leaf spring paper presentation details,leaf spring.
The analytical calculation was carried out for conventional leaf spring. Leaf spring is the main type of suspension system which is used. At the same time there is a need of high load carrying rear suspension to suit market requirement. For the leaf spring analysis one of the eye ends of the leaf spring is fixed to the chassis of the vehicle. The objective is to compare the stresses, deformations and weight saving of composite leaf spring with that of steel leaf spring.
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