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- Title
Measuring of Core Split Line Defect on Pillar Type Vented Brake Disc and Investigation of Crack Occurrence Potential on the Disc Caused by Its Geometric Deviation.
- Authors
Akyüz, Recep; Kulalı, Eren; Soncu, Ramadan; Öztürk, Cem; Karaca, Mehmet
- Abstract
In this study, a measuring method was defined to convert the level of defects on the pillar type vented brake disc to numeric data where the defects were formed due to missing material in the structure of the disc. Subsequently, the geometric defects which are existing in the core on the droplets were examined with the defined method in only pillar type vented brake disc. Finally, some thermal performance tests (brake disc thermal fatigue test on bench in accordance with Society of Automotive Engineers Brake Rotor Thermal Cracking Procedure for Vehicles (SAE J2928) [1] and brake disc crack test on vehicle; special test procedure of an original equipment manufacturer, which is performed for inspecting structural strength) and thermal fatigue test with thermal shock (test procedure formed by authors) were performed with defected brake discs to evaluate the risk of defected brake disc usage on the vehicle in terms of safety. The main open point is to determine whether the defect can transform to crack by influencing with notch effect during the worst usage conditions. In the conducted tests; it was investigated that the worst core split line defects which are specified by the defined measuring flow may cause a crack formation by proceeding notch effect under the worst usage condition. In order to simulate the worst usage condition; test laboratories, equipment and test track were used in this period for performing brake disc thermal fatigue test, crack test with thermal shock and crack test on vehicle.
- Subjects
NUMERICAL analysis; THERMAL shock; DROPLETS; FATIGUE (Physiology); CASTING (Manufacturing process)
- Publication
Celal Bayar University Journal of Science, 2020, Vol 16, Issue 1, p1
- ISSN
1305-310X
- Publication type
Article
- DOI
10.18466/cbayarfbe.633164