Why Do Fasteners Fail? An Insight in to the Modes and Mechanisms of Fastener Failures
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Sushant K. Manwatkar
is a scientist with Advanced Metallography Section (AMS) at Vikram Sarabhai Space Center, Trivandrum, India. His areas of interest include microstructural characterisation of aerospace materials and failure analysis investigations of aerospace structures and components.
is Deputy Head, Material Characterisation Division at Vikram Sarabhai Space Center, Trivandrum, India. His areas of interest include microstructure-mechanical property correlation in aerospace alloys and metallurgical failure analysis of space components and structures.
Abstract
In spite of the experiences in the design, material selection, fabrication and storage, fastener failures are reported frequently. While each failure leaves the user with some wisdom, analysing a failure is time consuming and affects the project schedules. In the aerospace scenario, it is all the more important to analyse the causes of fastener failures as a single failure can sometimes be catastrophic and mission critical. In the present paper, an attempt has been made to address why fasteners fail with a view to provide an insight into the modes and mechanisms. Finally, an attempt is made to bring out various modes and mechanisms of fastener failures. Four typical case studies on fastener failures are presented to highlight them.
Kurzfassung
Trotz der Erfahrungswerte für Design, Materialauswahl, Herstellung und Lagerung wird häufig von Versagensfällen bei Befestigungselementen berichtet. Jeder Versagensfall bringt dem Benutzer zwar neue Erkenntnisse, die Fehleranalyse allerdings ist zeitaufwändig und wirkt sich negativ auf Projektzeitpläne aus. In einem Szenario im Bereich der Luft- und Raumfahrttechnik ist eine Untersuchung der Versagensfälle bei Befestigungselementen umso wichtiger, da ein einzelner solcher Fall mitunter katastrophale Folgen haben und einsatzkritisch sein kann. In der vorliegenden Arbeit sollen Einblicke in Versagensarten- und -mechanismen gewährt werden und es wird versucht aufzuzeigen, warum Befestigungselemente versagen. Schließlich sollen verschiedene Versagensarten und -mechanismen hervorgehoben werden. Um diese zu beleuchten, werden vier typische Fallstudien zu Versagensfällen bei Befestigungselementen vorgestellt.
About the authors
is a scientist with Advanced Metallography Section (AMS) at Vikram Sarabhai Space Center, Trivandrum, India. His areas of interest include microstructural characterisation of aerospace materials and failure analysis investigations of aerospace structures and components.
is Deputy Head, Material Characterisation Division at Vikram Sarabhai Space Center, Trivandrum, India. His areas of interest include microstructure-mechanical property correlation in aerospace alloys and metallurgical failure analysis of space components and structures.
4 Acknowledgements
Authors wish to thank the Director, VSSC for his kind permission to publish this work.
4 Danksagung
Die Autoren möchten dem Direktor des VSSC für die freundliche Genehmigung zur Veröffentlichung dieser Arbeit danken.
References / Literatur
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© 2017 Carl Hanser Verlag GmbH & Co. KG
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- Why Do Fasteners Fail? An Insight in to the Modes and Mechanisms of Fastener Failures
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Articles in the same Issue
- Contents
- Editorial
- Editorial
- Failure analysis
- Damage-Sequences of Mountain Anchors
- Why Do Fasteners Fail? An Insight in to the Modes and Mechanisms of Fastener Failures
- Best of Schadensanalyse an Turbomaschinen – die Highlights aus 20 Jahren Laborpraxis
- Book Review
- Materials and Processes for Spacecraft and High Reliability Applications
- Top-ten downloads
- Top-Ten Article Downloads
- Top-ten downloads
- Picture of the Month
- People
- Interview with Prof. Dr. Andreas Neidel
- PM-NEWS
- PM-NEWS
- Meeting Dairy
- Meeting diary
