Fatigue life comparisons of the manufacturing processes for a steering knuckle
Summary :
Table of Contents
- Introduction
- Finite element analysis
- Component fatigue tests
- Conclusion
- References
Abstract
The Paper describes a vehicle steering knuckle under time-varying load during its service life.fatigue behavior is, therefore, a key consideration in its design and performance evaluation. This paper is aimed at assessing fatigue life and compare fatigue performance of steering knuckles made from three materials of different manufacturing processes. These include forged steel, cast aluminum, and cast iron knuckles. In light of the high volume of forged steel vehicle components, the forging process was considered as base for investigation. Monotonic and strain-controlled fatigue tests of specimens machined from the three knuckles were conducted. Static as well as baseline cyclic deformation and fatigue properties were obtained and compared. The paper envisages that in addition, a number of load-controlled fatigue component tests were conducted for the forged steel and cast aluminum knuckles. Finite element models of the steering knuckles were also analyzed to obtain stress distributions in each component.
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