IJERT-Diesel Engine Crankshaft High Cycle Fatigue Life Estimation and Improvement Through FEA (original) (raw)
Related papers
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/fatigue-failure-analysis-of-an-automotive-crankshaft-and-to-find-its-behavior-under-different-operating-loads https://www.ijert.org/research/fatigue-failure-analysis-of-an-automotive-crankshaft-and-to-find-its-behavior-under-different-operating-loads-IJERTV3IS10469.pdf Crankshafts in automotive engines experience a significant number of cyclic loads during its service. Mechanical fatigue failures are the most common cause of crankshaft failures. Crankshafts fail at the fillet regions of main journal and crankpin. The project highlights how to predict & improve the fatigue life of crankshaft using FEA technique. I will take the data for crank shaft such as dimensions and loads and torque for maximum and minimum rpm .Then create a CAD model of crankshaft by using Uni-Graphis. Then the fatigue failure analysis will be carried out by using ansys software. The crankshaft will be modified by using sufficient radius to the fillets regions where the stress concentration occurs. Then the structural analysis is to be carried out for the finite element model for Modified crankshaft. Then, the fatigue failure analysis is carried out by using ansys software. Then the results are compared for the existing and modified crank shaft all speeds and torques. Fatigue life, Total deformation and Factor of safety are the outcome of the Fatigue failure analysis. Project establishes the procedure for predicting and improvement the fatigue life of any component.
STATIC STRESS ANALYSIS AND OPTIMIZATION OF A DIESEL ENGINE CRANKSHAFT USING FEA
In recent years, there are many kinds or development of vehicle engine especially car and motorcycle engine. Each automotive company tried to develop their own engine to compete for new technology or invention in market. Internal combustion engine is one type of automotive engine in which fuel that run the mechanism is burned internally or burned inside the engine cylinder. There are two types in internal combustion engine which is reciprocating and rotary engine. The type of engine that usually used is two stroke and four stroke engine. In internal combustion engine, piston is one of the important part defined as cylindrical component that moves up and down in the cylinder bore by force produce during the combustion process. Static analysis is carried out in this paper to calculate stress, strain.
Stress and Fatigue Analysis of a Single Cylinder Engine Crankshaft
DAAAM Proceedings, 2020
To perform a stress analysis of a crankshaft over the entire cycle of an IC engine, one has to possess a loading history, i.e. the magnitude of the load should be available for every position of the crankshaft during the cycle. This loading history has been obtained through a dynamic analysis done in MATLAB and used in the finite element based stress analysis performed in SolidWorks Simulation 2019. After finding the optimal mesh using the manual h-convergence method, the FE analysis yielded the results neccessary for the fatigue life predictions at previously chosen critical locations. Fatigue performance of the crankshaft was evaluated both analytically and numerically.
IJERT-Evaluating Design of the Automotive Crankshaft for Fatigue Life using Finite Element Method
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/evaluating-design-of-the-automotive-crankshaft-for-fatigue-life-using-finite-element-method https://www.ijert.org/research/evaluating-design-of-the-automotive-crankshaft-for-fatigue-life-using-finite-element-method-IJERTV3IS090326.pdf The project is about the study of static and Fatigue analysis of crankshaft. Crankshaft is most complicated and highly strained engine part, which converts the sliding motion of the piston to a rotary motion by slider crank mechanism. Crankshaft is subjected to cyclic bending and torsional loads due to gas pressure and inertial forces. Due to these forces crankshaft is subjected to bending and torsional stresses with high stress concentration at crankpin fillet and journal bearing fillet. There for it is necessary to study the crankshaft for static and Fatigue analysis. The crankshaft Fatigue and Static analyzed is carried out using commercial FEA software.
Evaluating Design of the Automotive Crankshaft for Fatigue Life using Finite Element Method
2014
The project is about the study of static and Fatigue analysis of crankshaft. Crankshaft is most complicated and highly strained engine part, which converts the sliding motion of the piston to a rotary motion by slider crank mechanism. Crankshaft is subjected to cyclic bending and torsional loads due to gas pressure and inertial forces. Due to these forces crankshaft is subjected to bending and torsional stresses with high stress concentration at crankpin fillet and journal bearing fillet. There for it is necessary to study the crankshaft for static and Fatigue analysis. The crankshaft Fatigue and Static analyzed is carried out using commercial FEA software.
A fatigue analysis and life estimation of crankshaft–A review
The main objective of writing review on fatigue life of crankshaft is to investigate the behavior of crankshaft under complex loading conditions. Automobile industries are always interested to develop a new product which will be innovative and fulfill market expectations. All the engine components are subjected to constant to varying load which also varies in direction and due to these, components may fail. Bending and shear stress due to twisting are common stresses acting on crankshaft. Due to the repeated bending and twisting, crankshaft fails, as cracks form in fillet area. Hence, fatigue plays an important role in crankshaft development. Accurate prediction of fatigue life is very important to insure safety of components and its reliability. This review paper considers crankshaft as an important part of engine components, as forces which are acting on crankshaft are many and variable in nature. This paper presents an idea about research undertaken or completed on fatigue life o...
2017
Crankshaft is large volume production component with a complex geometry in internal combustion Engine (ICE), which converts the reciprocating displacement of the piston into a rotary motion of the crank. An effort was done in this paper to improve fatigue life for single cylinder engine crankshaft with geometric optimization. The modeling of the original and optimized crankshaft is created using SOLIDWORK Software and imported to ANSYS software for analysis. Finite element analysis (FEA) was performed to obtain maximum stress point or concentrated stress, to optimize the life of crank shaft by applying the boundary conditions. The maximum stress appears at the fillet areas between the crankshaft journal and crank web. The FE model of the crankshaft geometry is meshed with tetrahedral elements. Mesh refinement are done on the crank pin fillet and journal fillet, so that fine mesh is obtained on fillet areas, which are generally critical locations on crankshaft. The failure in the cra...
Crankshaft is one of the critical components of an IC engine, failure of which may result in disaster and makes engine useless unless costly repair performed. It possesses intricate geometry and while operation experiences complex loading pattern. In IC engines, the transient load of cylinder gas pressure is transmitted to crankshaft through connecting rod, which is dynamic in nature with respect to magnitude and direction. However, the piston along with connecting rod and crankshaft illustrate respective reciprocating and rotating system of components. the dynamic load and rotating system exerts repeated bending and shear stress due to torsion, which are common stresses acting on crankshaft and mostly responsible for crankshaft fatigue failure. Hence, fatigue strength and life assessment plays an important role in crankshaft development considering its safety and reliable operation. The present paper is based on comparative studies of two crankshafts of fatigue life assessment of a single cylinder diesel engine crankshaft by using High cycle fatigue (HCF) technique
Fatigue Failure Analysis of Crankshafts-A Review
Fatigue Failure Analysis of Crankshafts-A Review, 2020
The crankshaft is an essential component of internal combustion engines, which is widely used in an automobile. The most common modes of crankshaft failure are fatigue failure. During its operation, the crankshaft is always subjected to a cyclical load. Besides, the bending and shear load are also typical loads on the crankshaft. Due to the effect of these loads, the crankshaft fails and causes a substantial economic and loss of life. Therefore, predicting the more accurate fatigue life of the crankshaft is essential to save the economic and life losses. This paper discusses several existing approaches to predicting crankshaft fatigue life. Various analytical and experimental approaches used to predict fatigue life discussed. The most common analytical approaches used to predict life are total life approaches, crack initiation life prediction approaches, and crack growth. The review shows that most crankshaft failures are the result of fatigue. The crack initiation can occur due to high-stress concentration or as a defect during manufacture and can eventually propagate under cyclic loads.
Numerical Prediction of Fatigue Life of Crankshaft
In Automobile manufacturing plant, it was noticed that 7 out of 1000 crankshafts are prone to failure. This work is concentrated to identify the cause of failure in the crankshaft and to improve the fatigue life of the crankshaft by performing parametric study. In parametric study, the crankshaft is designed and analyzed in ANSYS WORKBENCH by varying the fillet radius of journal bearing. The maximum equivalent alternating stress and cycles to failure were predicted in numerical analysis. The cycles to failure are increased by varying the parameter and hence the fatigue life of crankshaft is improved.