This thesis describes designing and analysis of connecting rod. Dynamic analysis of the flexible connecting rod of a. Hamiltons principle and the constraint are used to formulate the governing equations of the connecting rod which is modeled as the timoskenko beam. For future research, the optimization should cover on material optimization to increase the strength of the connecting rod. Kinematic analysis you will begin by doing a kinematic analysis of the slidercrank i. Static stress analysis of connecting rod using finite element.

The dynamical equation of the slidercrank mechanism is established by using lagrange equation and newtons second law. Slider crank mechanism for demonstration and experimentation. Kinematic analysis of the crank, connecting rod, and piston. Proper optimization of this component, which is critical to the engine fuel efficiency and more vigorously pursued by the automotive industry in recent years, necessitates a detailed understanding of the applied loads and. Dynamic analysis of loads and stresses in connecting rods p. A new threedimensional finite element model of an inextensible elastic rod with equal principal stiffnesses is presented. Dynamic analysis of slender rods journal of energy. Dynamic analysis on crankconnecting rod mechanism of. First of all, to find the stress on the connecting rod, we use the formula. A time without the simplicity of hopping into a vehicle to take us anywhere we want to go is almost unfathomable to many americans.

Analysis of connecting rod bearing design trends using a modebased elastohydrodynamic lubrication model by travis m. Engineering analysis reciprocating engine connecting rods. Dynamic analysis of the connecting rod is similar to dynamics of the crankshaft, since these components form a slidecrank mechanism and the connecting rod. Dynamic analysis of slidercrank mechanism with a cracked rod. 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. Sep 05, 2017 7 videos play all unit 2 dynamic force analysis dom gagan bansal for the love of physics walter lewin may 16, 2011 duration. After analysis a comparison is made between existing steel connecting rod viz. This is why the connecting rod is the most stressed part of an engine system. Fem analysis of connecting rod of different materials. Dynamic load analysis was performed to determine the in service loading of the connecting rod and fea was conducted to find the stress at critical locations. The connecting rod is the intermediate member between the piston and the crankshaft.

Connecting rods in internal combustion engines are. The relations for obtaining the loads and accelerations for the connecting rod at a given constant speed of the crankshaft were also determined. Dynamic analysis of loads and stress in connecting rods. Pdf in this paper a dynamic simulation was conducted on a connecting rod made of aluminium alloy using finite element analysis. Dynamic modeling and analysis of a crank slider mechanism. In general, the failure occurs at the big end of connecting rod. Proper optimization of this component, which is critical to the engine fuel efficiency and more vigorously pursued by the automotive industry in recent years, necessitates a detailed understanding of the applied loads and resulting stresses under inservice conditions. Modern optimized design analysis of connecting rod of an. The objective of study is performed on a cast iron connecting rod of a compressor for the static and dynamic analysis. Engine connecting rod satyendra singh bagri1 amit telang2 1,2department of mechanical engineering 1,2maulana azad national institute of technology, bhopal, m.

The connecting rod is subjected to a complex state of loading. Kinematic analysis of the crank, connecting rod, and. The dimensions of the engine piston, connecting rod and crank shaft are calculated theoretically. The forces include both external and inertia forces. It undergoes high cyclic loads of the order of 108 to 109 cycles, which range from high compressive loads due to. The centre connecting rod has a palm end at the lower end to which the bottom endbearing keeps are bolted, whereas the upper end of the rod has an integral continuous lower half keep to which the upper halfbearing keeps are bolted. After measurements were taken, connecting rods were. Dynamic analysis of loads and stresses in connecting rods. Connecting rod buckling analysis using eigenvalue and explicit methods 2012320102 when designing a connecting rod, one needs to pay attention to the buckling strength of the rod. Request pdf dynamic analysis of loads and stress in connecting rods automobile internal combustion engine connecting rod is a high. In this paper, a parametric dynamic model of the crankconnecting rod mechanism of reciprocating pumps considering the crankshaftbushing clearance is proposed based on the multibody dynamics theory.

Fatemi, journalproceedings of the institution of mechanical engineers, part c. By simulation, the dynamic response of the mechanism with and without clearance is obtained and discussed. The connecting rod is one of the most important parts of an engine system. Connecting rod buckling analysis using eigenvalue and. Further analysis was carried out by anysis workbench. The constraint at the end of the flexible rod connected with the slider is derived. Dynamic analysis of the flexible connecting rod of a slider. Fatigue analysis of connecting rod using finite element. The ductile iron connecting rod experienced an average life of 1,605,902 cycles at a 50% survival rate or 635,811 cycles at a 90% survival rate. On the basis of design a physical model was modelled in proe creo parametric 2. Dynamic behaviour of a slidercrank mechanism associated with a smart flexible connecting rod is investigated. Dynamic analysis of loads and stresses in connecting rods citeseerx. Closure to discussion of internal dynamic force analysis for vtype enginecompressor with articulated power cylinder connecting rod mechanism 1989, asme j.

High compressive loads and high tensile loads are due to combustion and connecting rods. Dynamic modeling and analysis of a crank slider mechanism abhijit nagchaudhuri university of maryland eastern shore princess anne, md 21853 email. Three dimensional model of diesel engine connecting rod is developed by using solid workbench software. Shenoy submitted as partial fulfillment of the requirements for the master of science degree in mechanical engineering adviser. Dynamicforce analysis of a slider crank mechanism freebody diagrams of the moving members of linkages for the connecting rod moments about point b. The piston is the single, most active and very critical component of the automotive engine. Design and analysis of connecting rod using forged steel. The loads acting on the connecting rod as a function of time were obtained. Dynamic load analysis and optimization of a fracturesplit. Dynamic analysis of the connecting rod is done by ram bansal 6.

Literature survey suggests cyclic loads comprised of static tensile and compressive loads are often used for design and analysis of connecting rods. Jun, 2012 in this paper, a parametric dynamic model of the crankconnecting rod mechanism of reciprocating pumps considering the crankshaftbushing clearance is proposed based on the multibody dynamics theory. Dynamic analysis of linkages study notes for mechanical. Journal of mechanical engineering science, year2006. The slidercrank mechanism with an open crack rod is investigated and then establishes the equivalent mechanics model by a massless torsional spring to simulate the influence of the crack in the rod, and the mechanism of a cracked rod is divided into two. The buckling strength is heavily affected by the beam section, and johnsons buckling equation is used to estimate the buckling strength of a given beam section. Literature survey suggests cyclic loads comprised of static tensile and compressive loads are often used for design and analysis of. Blais a thesis submitted in partial fulfillment of the requirements for the degree of masters of science in mechanical engineering approved. Its use in static analysis is described and a time integration method for dynamic analysis is developed. Dynamic load analysis and optimization of a fracturesplit connecting rod dipak sarmah, athar m khan and anirudh jaipuria. Analysis of connecting rod bearing design trends using a. Dynamic analysis of the internal combustion engine thermodynamics 1.

Static stress analysis of connecting rod using finite. Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reciprocating motion of the piston into rotary motion of the crank. Ram bansal 20 7 conducted a dynamic simulation was on a connecting rod made of aluminium alloy using finite element analysis. Pdf dynamic analysis of loads and stresses in connecting. A comparison of manufacturing technologies in the connecting.

The connecting rods subjected to a complex state of loading. In this analysis of connecting rod were performed under dynamic load for stress analysis and optimization. Connecting rod, structural analysis, titanium, steel, gas load, fatigue, fea 1. They are used respectively depending on their field of application or use. These data were used in adams software to simulate the slidercrank mechanism. Therefore, the connecting rod should be able to withstand tremendous load and transmit a great deal of power smoothly. Pdf dynamic simulation of a connecting rod made of aluminium. The model permits large deflections and finite rotations and accounts for tension variation along its length. Abstract automobile internal combustion engine connecting rod is a high volume production component subjected to complex loading. As tolerance chain analysis is an essential activity in process planning for geometry assurance, a tolerance chains study based on monte carlo simulations for the connecting rod line has been performed to develop improved manufacturing solutions to lower costs and increase quality. Ali fatemi graduate school the university of toledo may 2004. After considering dynamic load conditions once again finite element analysis will have to be performed. In this regard, this paper presents the cinematic and kinetic analyses of the crank mechanism, stress and fatigue analysis and finally optimization of connecting rod.

Schematic of the slidercrank mechanism to be analyzed. A thesis entitled dynamic load analysis and optimization of connecting rod by pravardhan s. Both structural analysis and dynamic analysis are to be done for the assembly. It is necessary to perform complicated velocity and acceleration analysis for link 2 connecting rod that exhibits general plane motion to completely solve for the motion of the. Dynamic load analysis and optimization of connecting rod of. Connecting rod of the single cylinder four stroke diesel engine is used. 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. Another schematic of the slidercrank mechanism showing the mass centers of the crank and the connecting rod. This paper presents a case study on optimising a connecting rod, component of a sparkignition engine, in order to minimise its weight and lower the inertia forces. It fits in between the crosshead and the crankshaft and converts the pistons reciprocating motion to rotary motion with the crankshaft. A solid model of the connecting rod was generated using proe wildfire 3. Mithilesh k lade1, ritesh p harode2, deepali bankar lade3 3, by observing the analysis results for the static load of. 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 crank. Dynamic load analysis and optimization of connecting rod.

Dynamic analysis and controller design for a slidercrank. Engine connecting rod is undertaken to analyse and design the dynamic. Failure analysis of connecting rod at big end scientific. It is defined as the study of the force at the pin and guiding surfaces and the forces causing stresses in machine parts, such forces being the result of forces due to the motion of each part in the machine. This set of equations embodies both of the dynamicforce analysis approaches described in newtons laws.

Connecting rod is designed by machine design approach and compared with the actual production drawing. The dynamic analysis resulted in angular velocity and angular acceleration of the connecting rod and forces between the crankshaft and the connecting rod. Topology optimization, connecting rod, finite element analysis, minimum weight, linear static method. Tension and compression analysis in reciprocating engine. For this purpose, we use the autodesk inventor professional 2016 aip2016 software containing tools that enable either the dynamic analysis to determine the reactions of the connecting rod joints or the finite element analysis for. If the engine is operating, connecting rod fails, this could cause a critical situation. In order to understand the true impact the automobile has had on our society, we would have to go back in time over one hundred years.

August 8, 20 department of mechanical engineering kate gleason college of. As the piston and the other components of the assembly work under high temperatures, thermal analysis is also done. Pdf dynamic analysis of loads and stresses in connecting rods. 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. Kinematics and load formulation of engine crank mechanism. Design and analysis of assembly of piston, connecting rod and. Effect of various mechanisms parameters including crank length, flexibility of the connecting rod and the sliders mass on the dynamic behaviour is studied. Design and analysis of assembly of piston, connecting rod. Quasi dynamic finite element analysis was performed at several crank angles. The inlet valve opens, and the piston travels from top dead center, tdc state 0 to the bottom dead center, bdc state 1. Introduction a connecting rod can be of two types hbeam or ibeam or a combination of both. And dynamic analysis parameter is solving by mat lab. Designing of the analysis rod based on the input parameters and then modeling of the. The slidercrank mechanism with an open crack rod is investigated and then establishes the equivalent mechanics model by a massless torsional spring to simulate the influence of the crack in the rod, and the mechanism of a cracked rod is divided into two subsystems.

The connecting rod is one of the important part of an engine. 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. The average life of a malleable iron connecting rod was 764,962 cycles at a 50% survival rate or 347,734 cycles at a 90% survival rate. For this purpose, we use the autodesk inventor professional 2016 aip2016 software containing tools that enable either the dynamic analysis to determine the reactions of the connecting rod joints or the finite element. Automobile internal combustion engine connecting rod is a high volume production component subjected to complex loading. Dynamic analysis of loads and stress in connecting rods request. Doug woodyard, in pounders marine diesel engines and gas turbines ninth edition, 2009. Shenoy and fatemi 2005 were explained about optimization study was performed on a steel forged connecting rod with a consideration for improvement in weight and production cost.

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