Abstract
For the reliability of automotive components, it has to satisfy the dimension accuracy and the strength design requirements for part that has the consistent strength distribution. Since it has the defect due to actual manufacturing process and inhomogeneity of material, the strength design requirement should be not satisfied. In this way, verification of analysis and prediction of fatigue life was very difficult from difference of the failure region. The cold forging products generally has heterogeneity of strength, hardening and fatigue resistance. Therefore, it’s important to understand the characteristics of material strength and fatigue of cold forging products considering heterogeneous effect in order to do durability analysis. In this study, in order to propose the method of durability analysis with inhomogeneity of the material, the heterogeneous characteristics are confirmed by predicting the effective strain to perform the plastic deformation simulation influenced from the strength condition and microstructure of pulley at power transmission. Analysis and prediction of effective strain from cold forging is performed by software DEFROM for inhomogeneous characteristics. And the stress of the real operation in performed by MSC.NASTRAN. Also, through correlation about effective strain and hardness, the failure position and the life were estimated to predict the fatigue strength and the external applied stress.
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This paper was recommended for publication in revised form by Associate Editor Chongdu Cho
Hee-Jin Shim received the masters’ degree and Ph.D. degree from the Department of Mechanical Engineering, University of Hanyang, Korea, in 2005 and 2010, respectively. She is currently a senior researcher at KEPCO E&C. Dr. Shim’s research interests are in the areas of fatigue, integrity evaluation, welded joints and advanced materials. She studies these subjects through experimental and numerical means.
Jung-Kyu Kim received his Ph.D. degree from the University of Keio, Japan, In 1982. He is currently a full-professor in the Department of Mechanical Engineering in Hanyang University, Seoul South Korea. His principal research interests include the fatigue behavior of materials and components, the development of experimental methods to evaluate and monitoring fatigue damage.
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Shim, HJ., Kim, JK. Durability analysis of an automotive component in consideration of inhomogeneous hardness. J Mech Sci Technol 25, 621–629 (2011). https://doi.org/10.1007/s12206-011-0126-4
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DOI: https://doi.org/10.1007/s12206-011-0126-4