Design of connecting rod for weight reduction using c70s6. This material, when heat treated correctly, exhibits excellent wear properties and is very impact resistant. Connecting rods manufacturing improvements and process planning tolerance chain analysis and training material silvia garde gonzalez master thesis 2015. Fatigue analysis of connecting rod using finite element. Aluminium alloys also can be used for these as an alternative. To ensure proper wear of the pushrod tip and adjusting screw we offer pushrod tips in three different materials.
Selection of material, shape and manufacturing process for a connecting rod abstract this activity centers on the courses of strength of materials and production design offered at a sophomore level mechanical engineering curriculum. A connecting rod is one of the most mechanically stressed components in internal combustion engines. Design of connecting rod for weight reduction using c70s6 material deepak g. Closeddie forging technology and numerical simulation of. Here, the connecting rod is replaced by various materials like stainless steel. A comparison of manufacturing technologies in the connecting rod industry danielle visser department of metallurgical and materials engineering colorado school of mines golden, co 80401 submission to fierf 060608 advisor. Here stainless steel, aluminum alloy and high strength carbon fiber 280gsm bidirectional are used to analyze the connecting rod. Tension and compression analysis in reciprocating engine. Crackable connecting rod material selection by using topsis. A comparison of manufacturing technologies in the connecting rod industry danielle visser department of metallurgical and materials engineering. A connecting rod, also called a con rod, is the part of a piston engine which connects the piston to the crankshaft. Sand cast connecting rods starting with the 1962 buick v6 engine, general motors central foundry. Pdf comparision of two different materials for connecting rod. Connecting rod is highly stressed component, as it is subjected to the cyclic dynamical tensile and compressive loads.
However, when tested under fretting condition, decrease in fatigue lifetime was 20% and fatigue limit was reduced to. Its light and has the ability to absorb high impact, but it comes a. Some materials used for production of engine connecting rods in russia. Together with the crank, the connecting rod converts the reciprocating motion of the piston into the rotation of the crankshaft. Crankshaft design, materials, loads and manufacturing, by epi. Development of fracture splitting method for case hardened connecting rods. There are far more manufacturers of con rods who offer steel rods than any other material. Keywords crackable connecting rod, material selection, topsis method, ranking 1. Some important mechanical properties of crackable connecting rods 14. In this project the material carbon steel of connecting rod replaced with forged steel.
Material properties play an important role in the result of the fe analysis. Connecting rod made using particulate reinforced aluminum. In this project the material forged steel of connecting rod replaced with aluminium alloy. Dnvglcg0037 calculation of crankshafts for reciprocating. 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. Pdf on feb 28, 2014, venkatesh seenivasan and others published design and.
The properties of this material are the hardness changes in accordance with the depth, and the hardness and. Each material behaves in a similar manner when placed under a load. We were able to pull 2 specimens from the beam area of the rod one ea. 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. The small end which connect the connecting rod to the piston through the piston pin. Fem analysis of connecting rod of different materials. Selection of material, shape, and manufacturing process. In this project, one component of an engine in particular, the connecting rod, will be analyzed. In a few twostroke engines, the connecting rod is only required to push. Table iii material properties of connecting rod 11 sr. Current automotive ic engines connecting rods are made of steel. The electronic pdf version of this document, available free of charge. The mechanical properties of titanium alloy connecting rods are then compared with pf11c5060 and it is concluded that yield strength of powder metallurgy.
The connecting rod connects the piston to the crankshaft, and consists of the crank or big end, pin or small end, and shank. A comparison of manufacturing technologies in the connecting rod industry. Ordinary hotdie forging forming of aluminum alloy connecting rods features tedious production. Elimination of a heat treatment process improved machinability for high volume production low distortion on. The connecting rod is required to transmit the compressive and tensile forces from the piston, and rotate at both ends. We were asked to pull tensile specimens to check mechanical properties and to provide a chemical analysis of the metal to determine the alloy. Malgave 1student, 2student, 3assistant professor 1department of mechanical engineering, aitrc, vita, india abstract the connecting rod is a component which connects the reciprocating piston to the linear crankshaft. The connecting rod is used to convert the reciprocating motion of the piston to oscillatory motion of itself which is finally converts to rotary motion of the crank shaft 4.
The material properties are modulus of elasticity e 2. A thesis entitled dynamic load analysis and optimization of connecting rod by. Finally obtaining the new optimized connecting rod. In future the rod and cap will be fracture split to minimise cost for most volume produced connecting rods. After analysis a comparison is made between existing steel connecting rod viz. For purposes of bolt design, a rule of thumb is to size the bolts and select the material for this application such that each of the 2 rod bolts has a strength of approximately 20,000 lbs. Cad model of connecting rod will be modelled in proe.
Gp bearing applications gp is a superior material for highly loaded connecting rod bearings. In this study, we investigated the fatigue characteristics of sma40 materials as a potential application in connecting rod material for an automobile. In this work connecting rod is replaced by aluminium based composite material reinforced with silicon carbide and fly ash. Connecting rod, modeling, stress analysis of connecting rod, fatigue analysis, optimization. Joint structure between crankshaft and connecting rod. The objective of the present work is to design and analyses of connecting rod made of aluminium alloy. Steel bars wire rods nippon steel realizes the full potential of steel products as industrial materials, and thus. Weight can be reduced and strength can be achieved by changing the material of the current connecting rod to hybrid composites. This 8620 material is used in most pushrod tip applications and has a surface hardness of approximately 62 rockwell c. The connecting rod subjected to tensile load at crank end, while using factor of safety 3 as recommended by shenoy 2004. The concept of stress if it takes a unit force to stretch a rubber band of a given crosssectional. Finite element analysis of ic engine connecting rod by ansys r a savanoor1, abhishek patil2, rakesh patil3 and amit rodagi2 corresponding author. Assemblies are made up of components and subassemblies. 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.
It transmits the energy to the crankshaft through the connecting rod. Pdf design and comparative analysis of connecting rod. A study on fatigue characteristic of connecting rod materials. Average fatigue life of 168,700 cycles and fatigue limit of 437 mpa was determined from sma40 specimens. There are two ends of connecting rod one is known as the big end and other as small end.
You explore the hole wizard feature with manufacturing parameters and the mass properties, measure, and appearance tool. The predecessor to the connecting rod is a mechanic linkage used by water mills to convert rotating motion of the water wheel into reciprocating motion. A connecting rod basically connects the piston to the crankshaft whilst transmitting power of the combustion from the combustion chamber to rotate the crank. Crankshaft design, materials, loads and manufacturing, by. Introduction often materials are subject to forces loads when they are used. Gp material has good antifriction properties due to the combined action of the proprietary overlay components. It is a deepnitriding alloy containing 300 points of chrome, developed in the midnineties specifically for aerospace bearing applications. A comparison of manufacturing technologies in the connecting. Connecting rods forged 4340 steel connecting rod material. Connecting rod virtual labdayalbagh educational institute. Jun 20, 2015 design and construction of a connecting rod 1. Development of fracture splitting method for case hardened. Connecting rod free download as powerpoint presentation. Crackable connecting rod material selection by using.
Tension and compression analysis in reciprocating engine connecting rods. Comparission of two different materials for connecting rod. The maximum stress of the connecting rod monitored and make sure it is not over the allowable stress. It transmits the reciprocatory motion of the piston to the rotary crank. Material design for advanced connecting rod for mass optimizationdesign for light weight connecting rod dnyandeep k. It is produced mainly from ferrous materials steel, but in some cases where. Many material properties can be determined from the results of a tensile. Mass reduction opportunities offered by powderforged. Plain carbon steel forgings were the initial material of choice.
Connecting rods manufacturing improvements and process planning tolerance chain analysis and training material silvia garde gonzalez master thesis 2015 kth royal institute of technology. The geometric model, finite element mesh, physical dimensions, and design variables are shown in figure 3. Gp bearings have a higher maximum work temperature. Design and analysis of connecting rod using forged steel. And it also describes the modelling and analysis of connecting rod. Enhancing mechanical properties and avoiding cracks by simulation of quenching connecting rod. Analysis of connecting rod using composite material. Selection of material, shape, and manufacturing process for a. Material choices 4 last month, we looked further into the use of titanium for con rods and this month we look briefly into the use of steel, which remains in many cases the material of choice for con rods. Mechanical engineers calculate those forces and material scientists how materials deform elongate, compress, twist or break as a function of applied load, time. Material selection for manufacture of connecting rods. A con rod for a modern passenger car engine has been studied to show the performance of highdensity pmmaterials manufactured by warm compaction of high compressible low alloyed powders. Inherent properties such as strength, moduli and density.
Material design for advanced connecting rod for mass. The load of the connecting rod optimized is comprised of the tensile load of 26. Aluminum precision products recently received a connecting rod sample machined from billet. Solid45 element type is use for connecting rod material. The material of connecting rod will be optimized depending upon the analysis result output. Home blog automobile engineering ic engine major parts and its function, materials,images,manufacturing method. Comparission of two different materials for connecting rod using ansys. Steel materials are used to design the connecting rod.
Introduction connecting rods are widely used in variety of automobile engines. Youngs modulus e 210 gpa, yield strength sy 210 mpa. Connecting rods convert rotating motion into linear motion. Fem analysis of connecting rod of different materials using ansys. The material properties are one of the major inputs to perform the fea and optimization. The shape of the connecting rod is to be determined to minimize its weight subject to a set of stress constraints. Engine connecting rod an overview sciencedirect topics. Small specimen tests were carried out to evaluate and compare mechanical and fatigue properties of forged steel and powder metal connecting rod materials.
Handbook of diesel engines ggg 60 may also be used as a connecting rod material with the advantage of operation without a bushing in the small piston pin boss. One end of the connecting rod is connected to the piston through a piston pin while the other is connected to crank through a crank pin. Ic engine major parts and its function, materials,images,manufacturing method. In this in order to have a connecting rod equally strong in buckling about both the axis, the buckling loads must be equal. Analysis of connectiong rod for various composite materials. The connecting rods are generally made by forged steel or duralumin or carbon. A typical value for this reciprocating weight is in the vicinity of 20,000 lbs. Pdf design and analysis of connecting rod with modified. The function of the connecting rod is to transmit the thrust of the piston to the crankshaft and translate the transverse motion to rotational motion. Connecting rods are currently designed using mechanical properties obtained at room temperature. Pdf crackable connecting rod material selection by using. A study on fatigue characteristic of connecting rod. Ic engine major parts and its function, materials,images.
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