دوره 11، شماره 2 - ( 3-1400 )                   جلد 11 شماره 2 صفحات 3568-3560 | برگشت به فهرست نسخه ها


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Ashouri H. Low cycle fatigue life prediction of an engine exhaust manifold. ASE 2021; 11 (2) :3560-3568
URL: http://www.iust.ac.ir/ijae/article-1-515-fa.html
Low cycle fatigue life prediction of an engine exhaust manifold. Automotive Science and Engineering. 1400; 11 (2) :3560-3568

URL: http://www.iust.ac.ir/ijae/article-1-515-fa.html


چکیده:   (5533 مشاهده)
This paper presents low cycle fatigue (LCF) life prediction of an engine exhaust manifold. First Solidworks software was used to model the exhaust manifolds. Then Ansys Workbench software was used to determine stress and fatigue life based on Morrow and Smith-Watson-Topper (SWT) approaches. Thermal fatigue (TMF) of the engine components easily happens due to excessive temperature gradient and thermal stress. Modern exhaust systems must withstand severe cyclic mechanical and thermal loads throughout the whole life cycle. The numerical results showed that the temperature and thermal stresses have the most critical values at the confluence region of the exhaust manifolds. This area was under low cycle fatigue. After several cycles the fatigue cracks will appear in this region. The results of the finite element analysis (FEA) correspond with the experimental tests, carried out in references, and illustrate the exhaust manifolds cracked in this region. Finite element (FE) simulation proved a close correlation between Morrow and SWT criterions results. The lifetime of this part can be determined through finite element analysis instead of experimental tests.
 
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نوع مطالعه: پژوهشي | موضوع مقاله: موتور احتراق داخلی

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