Analysis of a Brake Cylinder Failure

A gray cast iron inlet boss was observed to have fractured following an accident in which a three-wheeled parking enforcement vehicle reportedly lost its braking ability and crashed on a hill in San Francisco, CA. Metallurgical and fractographic examination as well as exemplar testing conclusively d...

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Veröffentlicht in:	Journal of failure analysis and prevention 2011-06, Vol.11 (3), p.193-196
Hauptverfasser:	James, B. A., Lieberman, S. I.
Format:	Artikel
Sprache:	eng
Schlagworte:	Accidents Applied sciences Bosses Case History > -Peer-Reviewed Characterization and Evaluation of Materials Chemistry and Materials Science Classical Mechanics Corrosion Corrosion and Coatings Corrosion tests Cylinders Exact sciences and technology Fluid dynamics Fracture mechanics Fractures Gray iron Inlets Materials Science Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy Quality Control Reliability Safety and Risk Solid Mechanics Tribology Vehicles
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Beschreibung
Zusammenfassung:	A gray cast iron inlet boss was observed to have fractured following an accident in which a three-wheeled parking enforcement vehicle reportedly lost its braking ability and crashed on a hill in San Francisco, CA. Metallurgical and fractographic examination as well as exemplar testing conclusively determined that the inlet boss broke before the accident, and that the fracture occurred by overtorquing of the inlet hydraulic line during the vehicle servicing that occurred just prior to the incident.
ISSN:	1547-7029 1728-5674 1864-1245
DOI:	10.1007/s11668-011-9443-2