Papers by Keyword: Connecting Rod

Abstract: In recent years, diesel engine is developing rapidly in the direction of high power and super long stroke, which requires higher strength of its key moving parts. Connecting rod is one of the key moving parts of diesel engine which is subjected to complex alternating load during the working process. This loading condition has a great influence on its structural strength and reliability. In the proposed study, the strength and fatigue of a low-speed diesel engine con-rod made of 42CrMoA are analyzed. The 3-D model of the con-rod assembly built in the proposed study. The stress distribution and deformation of the con-rod assembly under the maximum explosive pressure are presented and studied. In the present paper, fatigue safety factor of all parts of con-rod assembly under the maximum explosive pressure condition is checked. According to the results carried out from the proposed work, the corresponding alternating stress is 340MPa, while the fatigue limit of 42CrMo material is above 430-540MPa, which means that the con-rod parts work under the alternating stress far below the fatigue limit. The kirasushvili method is adopted in the present paper as the standard of safety factor evaluation of con-rod. According to the allowable safety factor table of kirasushvili method, the minimum safety factor of the big and small ends of the con-rod and rod body can meet the requirements without fatigue damage.

Abstract: Composite materials are important engineering materials due to their outstanding mechanical properties. Composites are materials in which the desirable properties of separate materials are combined by mechanically binding them together. Each of the components retains its structure and characteristic, but the composite generally possesses better properties. Composite materials offer superior properties to conventional alloys for various applications as they have high stiffness, strength and wear resistance. The development of these materials started with the production of continuous-fiber-reinforced composites. The high cost and difficulty of processing these composites restricted their application and led to the development of discontinuously reinforced composites. The aim involved in designing metal matrix composite materials is to combine the desirable attributes of metals and ceramics. The addition of high strength, high modulus refractory particles to a ductile metal matrix produce a material whose mechanical properties are intermediate between the matrix alloy and the ceramic reinforcement. Metal Matrix Composites with Aluminum as metal matrix is the burning area for research now a days.

Abstract: This paper is intended to determine all significant factors affecting one of the most important characteristic of connecting rod that is coaxiality, in one of the main suppliers of this part in Middle East, in order to achieve the optimum combination and levels of these factors. By sampling the connecting rods produced under different levels of factors and combinations, and measurement of non-coaxiality, enough data is gathered. To determine meaningful impact of each intended factor and to specify all effective and ineffective factors, the authors have used DOE method. Achievement of best combination consists of affecting factors is defined through DMAIC cycle steps to reduce the non-coaxiality defect and to reach intended sigma values for the production process. According to the analysis of the results, better rate of non-coaxiality is obtained.

Abstract: This paper addresses a study undertaken to develop spatial numerical models of a piston, a piston pin and a connecting rod with reference to real components of a combustion engine crank system. The numerical studies conducted comprised an analysis of how the mechanical strength of piston pins was influenced depending on the change in their inner shape. For the purposes of calculations, various scenarios of shape modification were proposed for piston pins currently in use, enabling their weight to be reduced.

Abstract: In the present study the authors propose an experimental framework in order to perform FEA analyses upon a 3D model of a connecting rod. The study presents some of the technical issues that have been overcome by choosing the right software tools and the differences in terms of results that they may produce, it shows the setup used in the analyses including its constraints and loads, the proposed algorithm that imposed the number of analyses as well as their type, and the way the analyses were conducted in order for the results to validate or invalidate a optimized model. Because the connecting rod's 3D model presents a high level of complexity in terms of the number of free forms surfaces contained within the geometry, the authors propose a procedure by which they divide the geometry in areas of interest and in doing so can determine the most critical and the most affected areas under a given load for each FEA analysis. This procedure allows a virtual perspective of the modality through which the considered part gets affected and behaves under a given load in terms of distribution of stress and deformation, results that are consistent with its overall behavior.

Abstract: In order to predict the failure probability of a complicated structure, the structural responses usually need to be estimated by a numerical procedure, such as finite element method (FEM). To reduce the computational effort required for reliability analysis, response surface method could be used. However the conventional response surface method is still time consuming especially when the number of random variables is large. In this paper, a Fourier orthogonal neural network (FONN)-based response surface method is adopted to solve the reliability analysis of the automobile engine. The working process of the connecting rod is simulated with UG software, the dynamics analysis on crank-connecting rod-piston mechanism is performed with ANSYS and ADAMS software, with FEM analysis results, the stress information of the critical point of the structure can be obtained, so the performance function of the structure can be established. The FONN method is used to fit the performance function as well as its derivatives, so as to calculate the reliability of the structure.

Abstract: Connecting rod is one of the most important components of an internal combustion engine and transfers motion from the piston to the crankshaft and function as a lever arm. Existing connecting rod is manufactured by using C-70 alloy steel. In the current study, connecting rod is replaced by E-glass/Epoxy composite material for universal tractor. The static strength of connecting rod is analyzed in detail and the maximum stress is found. Some improvement methods are also provided for the material selection of connecting rod. Connecting rod is modeled in CATIA V5 software and it is imported in ANSYS 14 workbench for analysis. The main objective of this study is to perform the static analysis of universal tractor connecting rod to find out its static strength using ANSYS 14 workbench. Finite element analysis is done by considering composite materials. The best combination of parameters like Von mises stress, deformation and weight reduction for connecting rod is carried out.

Abstract: Because of the flaw and broken of the engine connecting rod, which have a negative influence on safety of motorcycle using. Through the checking and material analyzing of breaking engine connecting rod,material performance test,macroscopic fracture analysis as well as analyzing metallographic structure is because during the manufacture process of the engine connecting rod, it is unreasonable for grinding process, adopting modified technology to improve the quality of production, keeping the safety of motorcycle using as well as boosting the profits of Lieferant, wining the praise of customers.

Abstract: The static strength and dynamic characteristic of connecting rod used in model 10/7 L type air compressor with double actions was studied, the 3D model of connecting rod was established by SolidWorks software, and the finite element stress analysis and modal analysis were done by ANSYS; the analysis results can be used as the base to improve the design of the connecting rod.

Abstract: connecting rod parts except under larger dynamic load in the institutions, it is also connected with other parts, movement and direction, therefore, the part of the connecting rod connected with other parts on the machining accuracy is crucial. In this paper, analysis and study connecting rod machining process, through the improvement plan, ensure the accuracy of the important parts of the connecting rod parts and the connecting rod production and processing efficiency.