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Journal of Failure Analysis and Prevention
Published in: Journal of Failure Analysis and Prevention 5/2011

01-10-2011 | Case History—Peer-Reviewed

Fatigue Failure of Flanged Thermowell

Authors: Ahmad Ivan Karayan, Yudha Pratesa, Ahmad Ashari, Deni Ferdian

Published in: Journal of Failure Analysis and Prevention | Issue 5/2011

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Abstract

A fractured flanged thermowell was received for analysis. The fracture was located at the root of “U” insertion/immersion length which was welded to the flange. The failure of flanged thermowell was attributed to the vortex-induced fatigue. The failure was initiated by the weld failure to withstand the fluctuating load resulted from vortex after years of service. This weld failure then created stress raisers, as evidenced by the ratchet marks and river marks near the outer surface.
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Literature
1.
Giosan, I., Eng, P.: Vortex shedding induced loads on free standing structures. Struct. Vortex Shedding Response Estim. Methodol. Finite Element Simul.
2.
Foley, C.M., Ginal, S.J., Peronto, J.L., Fournelle, R.A.: Structural Analysis of Structures and Luminaire Supports. Marquette University, Wisconsin (2004)
Metadata
Title
Fatigue Failure of Flanged Thermowell
Authors
Ahmad Ivan Karayan
Yudha Pratesa
Ahmad Ashari
Deni Ferdian
Publication date
01-10-2011
Publisher
Springer US
Published in
Journal of Failure Analysis and Prevention / Issue 5/2011
Print ISSN: 1547-7029
Electronic ISSN: 1864-1245
DOI
https://doi.org/10.1007/s11668-011-9485-5

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