Cap alingment method, bearing inset crush and or machined grooves for bearing tabs and finally, piston pin hole diameter press fit pin or sized for a bushing and floating pin in which case the little end needs a hole for some lubrication. The objectives of this paper are to develop structural modeling, finite element analyze and the optimization of the connecting rod for robust design. In general a slider crank transmits motion generated by the linear displacement of the piston by a working fluid to rotational motion of a shaft. The weight of the connecting rod is also reduced by 0. Aluminum and titanium can be used for high performance engines like f1 cars where strength and lightweight dominate over the cost factor. Slider crank mechanism for demonstration and experimentation. To calculate stresses in critical areas and to identify the spots in the connecting rod where there are more chances of failure. Internal combustion engine handbook basics, components, systems, and perspectives list of chapters. Dynamic load analysis and optimization of a fracturesplit connecting rod dipak sarmah, athar m khan and anirudh jaipuria. Since 2016 roddesign provides rod building equipment via online shop to the rod builders in europe. Modelling and analysis of different connecting rod. This thesis has been focused on the study of the connecting rod manufacturing process.
The connecting rod cr is the main moving part and an important component of an internal com. Pdf design and analysis of a connecting rod for the 117kw. Hippoliti 1993 reported design methodology in use at piaggio for connecting rod design, which incorporates an optimization session. But, before inducing the truss member, basic design calculation will be used to derive the constant and varying design parameters 3. The structure of connecting rod was modeled utilized solidworks software. In our project we design a connecting rod for a four stroke single cylinder. To offer a technically correct and dimensionally accurate representation of an automotive type connecting rod, i think three things need to be addressed. Modern optimized design analysis of connecting rod of an. 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. A parametric model of connecting rod is modeled using catia v5 r19 software and to that model, analysis is carried out by using ansys. To reduce weight of the existing connecting rod based on the magnitude of the output of analysis.
Design and analysis of connecting rod using forged steel. Introduction he connecting rod is the connection between the piston and the crankshaft. First of all, to find the stress on the connecting rod, we use the formula. Connecting rod design 3d cad model library grabcad. It can reduce the consumption of materials and manufacturing cost. Other enveloping circle diameters may be available if sufficient quantities are required. Modern optimized design analysis of connecting rod of an engine. Thermodynamic calculation of mixed gas cylinder is analysised based on pv diagram drawing, it compared with theory and practice to optimize the design of the crankshaft. They fixed the ends of the connecting rod, to determine the deflection and stresses. The connecting rod connects the piston to the crankshaft, and consists of the crank or big end, pin or small end, and shank.
Bedse1 1department of mechanical engineering, savitribai phule pune university gokhale education societys r. Rules for classification and construction vi additional. The big end of the connecting rod is connected to the crankshaft. As a connecting rod is rigid, it may transmit either a push or a pull and so the rod may rotate the crank through both halves of a revolution, i. For such columns, the simple columnbaseplate connection detail shown in figure. Nov 02, 2016 as a connecting rod is rigid, it may transmit either a push or a pull and so the rod may rotate the crank through both halves of a revolution, i. The connecting rod was measured and the dimensions are modeled through the aid of solidworks 2017 software see fig. Modelling and analysis of different connecting rod material. Fatigue analysis for connecting rod of reciprocating. Slider crank mechanism for demonstration and experimentation page 6 background the assembly of a piston, cylinder, connectingrod and crankshaft is the classic form of the slidercrank mechanism. Currently existing connecting rod is manufactured by using carbon steel. Dnvglcg0037 calculation of crankshafts for reciprocating. Then modelling of connecting rod is import on ansys 15.
Analysis of connecting rod bearing design trends using a modebased elastohydrodynamic lubrication model by travis m. Steel materials are used to design the connecting rod. This thesis describes designing and analysis of connecting rod. Analysis of connecting rod bearing design trends using a mode. Deformation can be reduced by changing the material of the current al360 connecting rod to hybrid references 3367. Its primary function is to transmit the push and pull from the piston pin to the crank pin and thus convert the reciprocating motion of the piston into rotary motion of the crank. Fem analysis of connecting rod of different materials using ansys.
Every vehicle that uses an internal combustion engine requires at least one connecting rod depending upon the number of cylinder in the engine. In this project the material forged steel of connecting rod replaced with aluminium alloy. Connecting rod design factors such as joint surface flatness, bearing crush, geometric shape, and capscrew torque can significantly affect bore distortion, assembly stresses, and bearing and joint load distribution. Internal combustion engine handbook sae international. Introduction a connecting rod is the link between the reciprocating piston and rotating crank shaft. The design of good performance and long service life, crankshaft affects the engine performance and fuel economy. However, neither the details of optimization nor the load under which optimization was. The function of the connecting rod is to transmit the piston thrust to the. If connects reciprocating piston to rotating crankshaft, transmitting the thrust of the piston to crankshaft. Since 2016 roddesign provides rod building equipment via. This, however, may not be representative of the pin joints that exist in the connecting rod. Keywords inertia force engine speed operating load parting line comparative stress.
Compared with experiment and engineering calculations, cosimulation method of multisoftware is more economic and accurate. Design and analysis of a connecting rod for the 117kw six cylinders turbocharged diesel engine. Blais a thesis submitted in partial fulfillment of the requirements for the degree of masters of science in mechanical engineering approved. Refer chapter 25 from the book, design of machine elements by v. The load of connectingrod bearing is calculated by the dynamic calculation method, which is obtained by analyzing the applied forces on the engine crankrod mechanism based on the engine cylinder pressure indicator diagram some shown in figure 1 measured in engine bench test and configuration parameters. Sapat college of engineering, management studies and research, nasik 5,india.
The objective of the present work is to design and analyses of connecting rod made of aluminium alloy. In accordance with these design steps, medium carbon steel is preferred as a material for connecting rod. The main function of connecting rod is to transmit the translational motion of piston to rotational motion of crank shaft. The loads of all main bearings are calculated by the finite element method of. Where there are cranks of different geometrical configuration e.
Dynamic load analysis and optimization of a fracturesplit. The analysis of the scania line together with a benchmark among different leading companies on the connecting rod manufacturing has been undertaken. Lubrication performance of connectingrod and main bearing. Analysis of connecting rod bearing design trends using a. Small end of the connecting rod is connected to the piston by means of gudgeon pin. Furthermore, optimal design of the connecting rod would be benefit from the calculation results. Calculation and study of the failure of the connectingrod. In this project, one component of an engine in particular, the connecting rod, will be analyzed. Internal combustion engine handbook basics, components, systems, and perspectives. Design and analysis of assembly of piston, connecting rod and. What is the design procedure for an connecting rod. Design and analysis of 150cc ic engine connecting rod.
Connecting rod is one of the important driving parts of the petrol and diesel engine. A reference book on ic engine connecting rod design by cad. Fatigue strength is the most important driving factor for the design of connecting rod and it is found that the fatigue. In order to design needle roller and cage assemblies for a specific engine, the technical data of the engine must be taken into consideration. Being one of the most integral parts in an engines design, the connecting rod must be able to withstand tremendous loads and transmit a great deal of power.
Tension and compression analysis in reciprocating engine. Gopal et al design and analysis of assembly of piston, connecting rod and crank shaft 237 international journal of current engineering and technology, vol. The connecting rod is the intermediate member between the piston and the crankshaft. Connecting rod design a6200 reengineering the model. The friction between the walls of the cylinder and the piston rings. Index terms connecting rod, weight reduction, fatigue strength, better machinability i.
It is no surprise that a failure in a connecting rod can be one of the most costly and. Design of crank shaft, connecting rod and valve gear. The decisive alternating values will then be calculated. Calculation and study of the failure of the connectingrod small end based on thermoelastic plasticity guohua chen, ridong liao, and xue jiang proceedings of the institution of mechanical engineers, part d. Looking to the complexity of the geometrical forms and the boundary condition involved, in formulating the mathematical model used to calculate the stresses developed in connecting rod of internal combustion engine, it is not possible to use graphical, analytical or analogical methods in design procedure. Oct 19, 2016 introduction connecting rod is an integral component of internal combustion engine. N connectingrod length ln mm figure 2 articulatedtype connectingrod details of crankshaft material. Stress analysis of connecting rod for weight reduction a. Fatigue analysis for connecting rod of reciprocating piston. Manufacturing variations in joint surface flatness and bearing crush were predicted. Fem analysis of connecting rod of different materials. August 8, 20 department of mechanical engineering kate gleason college of engineering. Fatigue strength is the most important driving factor for the. Pdf design and analysis of a connecting rod for the.
Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. The stress in the piston rod is one factor to consider in the design, and in some cases it may be the limiting factor or the weakest link in the chain. This imbalance generally manifests itself as a vibration, which causes the engine to be perceivably harsh. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Design of connecting rod a connecting rod is a machine member which is subjected to alternating direct compressive and tensile forces. Deformation can be reduced by changing the material of the current al360 connecting rod to hybrid references 3367 1 k. For such columns, the simple columnbaseplate connection detail shown in figure 1. This paper summarizes the methodology to design fracturesplit fs connecting rod using cae tools, ensuring product quality with reliability and rapid response in terms of study. Since the compressive forces are much higher than the tensile force, therefore the crosssection of the connecting rod is designed as a strut. The function of the connecting rod also involves transmitting the thrust of the.
Design, modelling and analysis of a 3 stage epicyclic planetary reduction gear unit of a flight vehicle k akhila1 and m amarnath reddy2 corresponding author. This paper presents the design connecting rod of internal combustion engine using the topology optimization. The design of the crankshaft and connecting rod mechanism. The electronic pdf version of this document, available free of charge. Since the piston is the main reciprocating part of an engine, its movement creates an imbalance.
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