M.S. (Master of Science)
Department of Mechanical Engineering
Automobiles--Motors--Exhaust systems; Bellows (Mechanical engineering); Materials--Fatigue; Torsion
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.
Epifano, Michael, "Torsional fatigue strength of hydroformed bellows used for automotive exhaust connectors" (1998). Graduate Research Theses & Dissertations. 6476.
vii, 110 pages
Northern Illinois University
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