Modelling and design of an exhaust manifold under thermomechanical loading

In the early stage of designing an exhaust manifold, a designer usually has to perform the fatigue analysis of each candidate of the exhaust manifold, and to decide whether or not it is satisfactory. In each case, elastoplastic stress analysis by the finite element method (FEM) is required, which is very time consuming considering the preprocessing and post-processing of the FEM data. In this study, a thermal stress index is proposed for a practical application to the early stage of designing the exhaust manifold. Although this index (the ratio of the elastic effective stress to the yield stress) does not predict quantitatively the expected fatigue life, it is believed that it can be easily evaluated, and its merit lies in the quick estimation of the effect of the design parameters at the development stage without performing complete non-linear analysis of fatigue.
Publisher
Professional Engineering Publishing Ltd
Issue Date
2006-12
Language
ENG
Citation

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, v.220, no.D12, pp.1755 - 1764

ISSN
0954-4070
DOI
10.1243/09544070D06404
URI
http://hdl.handle.net/10203/87739
Appears in Collection
ME-Journal Papers(저널논문)
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