Failure Mode Analysis of Automotive Exhaust System Hot End Tenneco China R&D Center

Format:

Conference/Event

Author/Creator:

Dai, Dai, author.

Contributor:

He, Hongbo

Xu, Donghui

Conference Name:

SAE 2011 World Congress & Exhibition (2011-04-12 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

In this paper, a technical approach is proposed to solve the hot end failure issue of an exhaust system, which can increase the reliability and efficiency of FE calculation in the trouble-shooting process. An exhaust system in which the downpipe broke during the high speed road load test is taken as an example. In order to keep the virtual FE model consistent with the real operational conditions, lots of modifications are made, including mass correction, damping and Young's modulus. Also modal sensitivity analysis is performed to accelerate this correlation process between FEA and test, where the effect of Young's modulus, pipe wall thickness and isolator stiffness on the modal frequency is investigated. Based on the correlated FE model, the revised design is checked through inputting the engine dyno vibration data and stress levels are evaluated near the critical locations. It is validated by test that the revised design proposed following the current approach meets the durability target

Notes:

Vendor supplied data

Publisher Number:

2011-01-0787

Access Restriction:

Restricted for use by site license