The main aim of the present research is to determine total deformation, fatigue analysis and optimization in the existing connecting rod. The main objective of this study was to explore weight reduction opportunities for a production forged steel connecting rod. Finite element analysis of connecting rod is done by considering the materials, viz. Introduction conversion of the pistons reciprocating motion into the rotational motion of the crankshaft is the major function of the connecting rod. If the existing design shows the failure, then suggest the minimum design changes in the existing connecting rod. The function of the connecting rod also involves transmitting the thrust of the piston 1. Compared with the traditional analysis software, the simulation. The analysis is done using software ansys workbench 18. Review of stress analysis of connecting rod using finite. Static and fatigue analysis of aluminum silicon carbide.
After successful import of model material property is defined. The connecting rod fatigue of universal tractor u650 was investigated through the ansys software application and its lifespan were estimated. Fatigue analysis of the connecting rod in internal combustion engines. Analysis of fatigue stresses on connecting rod subjected. Connecting rods are subjected to forces generated by mass and fuel combustion. This study analyzes the failure mechanism of the connecting rod, establishes its three dimensional model, uses dynamic simulation software adams to calculate. Kinematics and load formulation of engine crank mechanism.
After analysis a comparison is made between existing steel connecting rod viz. Stress and failure analysis of the connecting rod of diesel. The model consists of the piston, piston pin, piston ring, bushing. Stress analysis of the connecting rod the stress analysis of the connecting rod was made using the ansys software 16. First connecting rod model is imported to the ansys by converting the catia file into. Therefore, a finite element model of the connecting rod and wrist pin without the oilhole was also analyzed. A parametric model of connecting rod is modeled using solid work software and to that model, analysis is carried out by using ansys 15. Fatigue analysis and longevity after a 000cycle load, assessed through using of ansys software.
Fatigue analysis of connecting rod of u650 tractor in the. Fatigue analysis in the connecting rod of mf285 tractor by. Fem analysis of connecting rod using ansys workbench 14. On the basis of the static strength analysis, fatigue life and fatigue safety factor of the connecting rod were get by fatigue strength analysis. Fea was performed using these results obtained from load analysis to gain an insight of the structural behavior of connecting rod and to determine design. Index terms connecting rod design, connecting rod, fatigue testing, finite element analysis, analytical approach, weight reduction. Fatigue analysis of connecting rod using finite element. Connecting rod fatigue in a certain type of diesel engine is analyzed by using finite element analysis method and the fem software ansys. Simulation durability tests are efficient, have short cycles, and can be reinforced to.
First connecting rod model is imported to the ansys by. This paper presents a thermomechanical finite element analysis model for the stress and fatigue analyses of engine pistons. Index terms connecting rod, weight reduction, fatigue strength, better machinability i. Stress analysis of connecting rod for weight reduction a. Connecting rod is modeled using catia software and fe analysis is carried out using ansys software. So firstly a proper finite element model is developed using cad software catia. Fatigue analysis for connecting rod of reciprocating piston. Yield, fatigue and buckling characteristics are often used as evaluation indexes for the performance of engine connecting rods in mass reduction design to optimize vibration. Developing an engine connecting rod fatigue test system. These loads were applied on the connecting rod in four load steps i. The timeload spectrum of engine connecting rod is obtained using dynamics simulation by adams software.
The connecting rod chosen for the study is of 4 stroke single cylinder engine in which failure of the connecting rod results in the replacement of the whole connecting rod crankshaft assembly. Fatigue analysis for connecting rod of reciprocating. The stress analysis of the connecting rod was made using the ansys software. For stress analysis of connecting rod it was modelled and meshed in ansys ver. Fatigue analysis of the connecting rod in internal combustion engines to cite this article. The result of proe model of the rod imported into adams software is shown. Static analysis is done to determine vonmisses stresses, strain, shear stress and total deformation for the given loading conditions using analysis software i. Some improvement methods are also provided for the material selection of connecting rod.
By using apdl language programming, the work load on the connecting rod, calculated. Determination of fatigue life of a connecting rod of a. The maximum and minimum values of parameters like vonmises stress, strain and deformation are. Structural systems of connecting rod can be analyzed using finite element techniques. Since the connecting rod has two ends, one of its ends is connected to the piston by the piston pin, and the other end moves in a circular shape or revolves. According the actual working conditions, the threedimensional model with multibody contact is established to simulate the contact between the connecting rod parts. Ansys software is a kind of analysis software commonly used in the field of mechanical structure. First the connecting rod solid model is imported from proengineer wildfire 3. The chances of fatigue failure in connecting rod are higher when it is subjected to alternative compressive and tensile. Comparison of materials for universal tractor connecting rod.
Simulation durability tests are efficient, have short cycles, and can be reinforced to comprehensively test connecting rod fatigue. The main methods for studying connecting rod durability include modeling, infield tests, and simulation durability tests. Moreover fatigue analysis of connecting rod was also recommended. In this study, detailed load analysis under service loading conditions was performed for connecting rod of mf285 tractor engine by using the mathematica software, followed by finite element analysis fea to capture stresses and fatigue cycle by using ansys software.
Static structural analysis of connecting rod in ansys. For the reason that the connecting rod failure is usually due to the fatigue phenomenon, m. Analysis and optimization of connecting rod used in heavy. The numerical analysis of connecting rod, shown its dimensions in figure 3, by using ansys workbench package v.
Alternatively, you can add the tutorial project from the public projects library by searching for tutorial. It fits in between the crosshead and the crankshaft and converts the pistons reciprocating motion to rotary. To predict the fatigue life of the connecting rod, the timeload spectrum analysis of the rod of a diesel engine is performed, the finite element analysis software adams is used to simulate the real force of the actual situation. Load distribution plays important role in fatigue life of. Compared with experiment and engineering calculations, cosimulation method of multi software is more economic and accurate. The 3d solid model geometry of the connecting rod was extracted from proe software. To start this tutorial, you have to import the tutorial project tutorial01. Calculations based on fatigue life and accurate loading histories permit rod to be optimized. With fatigue analysis we can determine the lifetime of the connecting rod.
The model discussed above has been used for the computational determination of the fatigue life of u650 universal tractor connecting rod with complete data set given in. Fatigue analysis of connecting rod in ansys youtube. The connecting rod is one of the most important parts of an engine system. It acts as a linking member between piston and crank shaft. Rod is subjected to continuous compressing loading. In this paper, stress distribution and fatigue life of connecting rod in heavy vehicle engine were parametric model of connecting rod is modeled using catia v5 r20 software and to that model. The modified goodman diagram is used to carry out fatigue study based on stress life sxn theory. Connecting rod is modeled in catia v5 software and it is imported in ansys 14 workbench for analysis. Dynamic analysis of the connecting rod is similar to dynamics of the crankshaft, since these components form a slidecrank mechanism and the connecting rod motion applies dynamic load on the crankpin bearing. Connecting rod is an integral component of an engine and it is classified under functional component based on its application. Pdf fatigue analysis of the connecting rod in internal combustion. Design, buckling and fatigue failure analysis of connecting. Design and analysis of connecting rod using forged steel.
To create a new mesh from this cad model, click the blue mesh geometry button. Paper open access fatigue analysis of the connecting rod. Connecting rod is an important component in reciprocating type of i. Calculations based on fatigue life and accurate loading. Currently existing connecting rod is manufactured by using forged steel. Developing an engine connecting rod fatigue test system based.
Based on the rod stress and miner fatigue damage theory, the goodman fatigue method is used to calculate the fatigue strength of the rod and to predict its fatigue life. Procedure the fea model included the hollow wrist pin and the connecting rod. In this research, only the static fea of the connecting rod has been performed by the use of the software. The connecting rod chosen for the study is of 4 stroke single cylinder engine in which failure of the connecting rod results in the replacement of the whole connecting rod crankshaft. Probabilistic analysis for resolving fatigue failures of the. Approximately 60 to 90 percent of connecting rod damage is caused by fatigue, and fatigue damages are mainly caused by dynamic alternating loads. The material properties of piston, connecting rod and crankshaft are defined and the mass of them are calculated, respectively. The static strength of connecting rod is analyzed in detail and the maximum stress is found. Dynamic analysis of the connecting rod is similar to dynamics of the crankshaft, since. The below table describes about the dimensions of forged steel and powder metal connecting rod dimensions, which. On the basis of design a physical model was modelled in proe creo parametric 2. Journal of asian scientific research failure analysis of a. According the actual working conditions, the threedimensional.
Compared with experiment and engineering calculations, co. Finite element analysis of connecting rod for internal. Based on the traditional theory and methods of the fatigue life analysis, the engine connecting rod fatigue life is predicted by finite element analysis method and dynamic simulation method chen et al. Stress and failure analysis of the connecting rod of. A solid model of the connecting rod was generated using proe wildfire 3. In this study, a finite element routine was first used to calculate the static displacements and stresses under the maximum compression and tension loadings in the connecting rod of universal tractor. Introduction he connecting rod is subjected to a complex state of. Furthermore, the existing connecting rod can be replaced with a new connecting rod made of astm a 514 steel cold quenched that is 12% lighter and 28% cheaper. Analysis of fatigue stresses on connecting rod subjected to. Load distribution plays important role in fatigue life of the structure. Bush failure changes the loading direction and distribution. Connecting rod stress analysis into your dashboard via the link above. Aug 28, 2015 static structural analysis of connecting rod in ansys. Fatigue analysis of connecting rod using finite element analysis 791 fig7.
Stress and fatigue analysis of engine pistons using thermo. Here we discuss the fatigue analysis of connecting rod. Introduction he connecting rod is the connection between the piston and the crankshaft. Finite element analysis of the fatigue life for the connecting rod. To solve the problem, the nonlinear static analysis was utilized. Fatigue analysis of connecting rod using finite element analysis 789 the stress at any point on the connecting rod at this axial load can be interpolated from the axial stress analysis results. As a result of numerical calculations the maximum principal. In the first part of the study, the static loads acting on the connecting rod, after that the work is carried out for safe design. Failure analysis of connecting rod at big end scientific. Sucker rod failure analysis is challenging and you need to be able to look past the obvious and seek clues from the not so obvious. Pdf fatigue in engine connecting rod bolt due to forming. In this study, detailed load analysis under service loading conditions was performed for connecting rod of mf285 tractor engine by using the mathematica software, followed by finite element analysis fea. Fatigue analysis of diesel engine connecting rod based on.
Static and fatigue damage analysis of a connecting rod istam. The stress and fatigue analysis of the composite connecting rods is found to be better than that of the standard connecting rod design and fatigue analysis on metal. Nevertheless, connecting rod design is complicated because the engine is to work in. Pdf fatigue in engine connecting rod bolt due to forming laps. Keywordsconnecting rod, astm a514 cold quenched steel, static analysis, fatigue analysis, stress life approach.
When the repetitive stresses are developed in the connecting rod it leads to fatigue phenomenon which can cause dangerous ruptures and damage. Our main objective to determine best material for connecting rod after analysing at ansys workbench 16. Finite element analysis of the fatigue life for the. The connecting rod transmits the piston load to the crank causing the latter to turn, thus converting the reciprocating motion of the piston into a rotary motion of the crankshaft. Fatigue analysis of connecting rod of u650 tractor in the finite. Fatigue analysis of connecting rod of samand engine by finite. Pdf fatigue analysis of connecting rod of universal tractor through. Static stress analysis of connecting rod using finite element. This has entailed performing a detailed load analysis. It is estimated that 50 90% of structural failure is due to fatigue, thus there is a need for quality fatigue design tools. Infield tests can reveal connecting rod working conditions, but the test cycle is long, costly, and cannot be reinforced. Static stress analysis of connecting rod using finite. If the existing design shows the failure, then suggest the.
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