Evaluation of Fatigue, Oxidation and Creep Damages on Thermo-mechanical Fatigue Life for Cylinder Heads | ||
| AUT Journal of Mechanical Engineering | ||
| دوره 9، شماره 3، 2025، صفحه 281-294 اصل مقاله (1.08 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajme.2025.23540.6142 | ||
| نویسنده | ||
| Hojjat Ashouri* | ||
| Department of Mechanical Engineering, Varamin-Pishva Branch, Islamic Azad University, Varamin, Iran | ||
| چکیده | ||
| The objective of the present study was to analyze the cylinder heads' thermo-mechanical fatigue life. This investigation was done by employing the finite element method. Moreover, ANSYS software was also used to achieve temperature and stress predictions. The thermo-mechanical fatigue life was then examined using Sehitoglu theory and FEMFAT software. The cylinder head's elastic and plastic properties were acquired at various temperatures by low-cycle fatigue tests. Low-cycle fatigue tests were simulated by ANSYS software, and excellent agreement was observed between the experimental and simulation results low-cycle fatigue tests. According to the finite element analysis, 208.6°C and 89.475 MPa were the maximum temperatures and stresses in the cylinder head at the valve bridge, which is located betwixt exhaust valves. The thermo-mechanical fatigue life analysis showed 71.16%, 25.04%, and 3.79% for mechanical, oxidation, and creep damages, respectively. The thermo-mechanical fatigue results proved the significant impact of the mechanical damage on the cylinder head's total thermo-mechanical fatigue life. Moreover, the numerical results indicated the negligibility of the creep damage. | ||
| کلیدواژهها | ||
| Cylinder Head؛ Fatigue Damage؛ Oxidation Damage؛ Creep Damage | ||
| مراجع | ||
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