Publication Date

1998

Document Type

Dissertation/Thesis

First Advisor

Gupta, Abhijit

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Mechanical Engineering

LCSH

Automobiles--Motors--Exhaust systems; Bellows (Mechanical engineering); Materials--Fatigue; Torsion

Abstract

Hydroformed bellows used for automotive exhaust connectors are subjected to torsional load. Under even a small angle of twist these bellows exhibit elastic torsional buckling and spiral distortion. Models of bellows are made and stresses are computed by finite element method. Experiment is set up to subject the bellows to undergo prescribed angle of twist and then measure strains by strain gages and detect failure by leak detector. Stresses obtained by finite element values are compared with experimental values obtained by placing strain gages at the critical sections. Finally, torsional fatigue strength of the bellows is obtained. Identical failure modes of bellows in torsional buckling with spiral distortion are observed both by finite element method and experiment.

Comments

Includes bibliographical references (leaf [47])

Extent

vii, 110 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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