Fatigue Analysis And FE-Fatigue Life Estimation Of Crankshaft Of Emulsion Pump

With the increasingly fierce market competition, people are increasingly demanding high quality of the products. Company's priority is how to improve the product quality. Applying advanced design method and shortening product development cycles are important means to improve the quality of products and gain a larger share of the market.There are two usual methods can be used to determine the life of products: test method and test analysis. The traditional method (namely test method) rely entirely on testing to determine the life of products. Test method directly through the testing to obtain the fatigue data. Although test method is reliable, in the product design phase produce massive physical prototypes to test fatigue life of products under different circumstances (such as Structure size,loading regime,service conditions,process condition, etc.), in terms of labor,financial resource or from the development cycle are not feasible. As the product structure,external applied load and service conditions difference, makes the test result to be widely divergent and resulting in the result does not have a generic. Unfortunately, for a long time test method is the main method that people gain fatigue life of products.The major trends in modern product to large-scale,complex development of, using the traditional product design method namely "design-test-adjustment" is very cumbersome, and sometimes can not be achieved. With computer technology continuous development and infiltration, Computer Aided Engineering (CAE) has been widely applied to various industrial fields. At present, finite element technology has became an indispensable tool in the anti-fatigue design.In this paper, fatigue life analysis for the major components of emulsion pump (crankshaft) is finished through the use of "integration" anti-fatigue design methods. This method has two major aspects:one is based on the experimental test; the other hand is based on the FE-Fatigue simulation analysis, these two aspects confirms mutually and correlate with each other. The main task of this paper is to complete the FE-Fatigue analysis. General fatigue analysis is required to enter three parameters:Fatigue of materials characteristic,cyclic loading history,geometry information. For the completion of the FE-Fatigue analysis, we need to gain two aspects main information:stress/strain and cyclic loading history. First of all, using Pro/E to establish three-dimensional virtual prototype model of emulsion pump, and define the relevant structures and impose the appropriate constraints; after model import ADAMS, dynamics simulation analysis is finished in ADAMS in order to obtain virtual loading history of the main components. Finally through finite element software MSC.Patran compute stress/strain distributions of crankshaft. Based on two aspects information and the appropriate fatigue analysis criteria, a professional fatigue analysis software MSC. Fatigue is employed to predict fatigue life of crankshaft and the other relevant components.FE-Fatigue analysis has the following advantages:in the product design stage, we can determine the fatigue risk of components and by modifying the design to avoid the irrational life distribution and providing a more reliable basis for product improvements designed.