Try Mobilus Beta
Search tips
 This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Study of the Fatigue Failure of Engine Valve Springs Due to Non-Metallic Inclusions

Journal Article
2012-01-0498
ISSN: 1946-3979, e-ISSN: 1946-3987
DOI: https://doi.org/10.4271/2012-01-0498
Published April 16, 2012 by SAE International in United States
Study of the Fatigue Failure of Engine Valve Springs Due to Non-Metallic Inclusions
Sector:
Citation: Choucair, H., Zhou, J., Jawad, B., and Liu, L., "Study of the Fatigue Failure of Engine Valve Springs Due to Non-Metallic Inclusions," SAE Int. J. Mater. Manf. 5(2):388-394, 2012, https://doi.org/10.4271/2012-01-0498.
Language: English

Abstract:

The engine valve spring is a very important component in automotive engine systems. The non-metallic inclusions in an engine valve spring will significantly reduce its reliability. In this study, an attempt was made to establish a correlation between fatigue failures and non-metallic inclusions by applying statistical methods. Fatigue tests with BZ and OTEVA-90 materials are performed with two different types of experiments, which are rotating bending fatigue test (Nakamura test) and spring fatigue test. By using RELIASOFT, the data of these two tests are analyzed with the Weibull distribution in order to statistically estimate BZ and OTEVA-90's fatigue lives at 90% low confidence under different stresses. On the other hand, fatigue strength of these materials can be estimated by Murakami and Endo's model with maximum inclusion size predicted from the Gumbel distribution.

Recommended Content

Technical Paper Test Correlation of an Exhaust System Durability Failure Using Enhanced CAE Approach
Technical Paper Fatigue Design of PM-Gears Under Consideration of Herzian Pressure with Sliding and Tooth Bending
Journal Article Automotive Structural Durability Design Using Dynamic Simulation and Fatigue Damage Sensitivity Techniques