Failure analysis of braided U-shaped metal bellows flexible hoses
by Pierce, Stephen O., M.S., THE UNIVERSITY OF ALABAMA IN HUNTSVILLE, 2010, 84 pages; 1487677

Abstract:

Most of the research performed extensively reviews the effects of non-reinforced metal bellows and their pressurized characteristics. However, the majority of flex hoses are manufactured with reinforcement by the means of interweaved wire braids. For this research, the outer braid reinforced metal bellows flex hoses will be examined for their failure at differing lengths. The relationship with the bellows expansion joints is such that as the length of the flex hoses increases, the pressure at which squirm occurs decreases. As such, for the testing being performed, the same approach to failure is expected. As the length of the flex hose increases, it is predicted that the hose will fail at a decreasing pressure. Since the braid is the only thing that prevents the squirm from occurring, more of the load will be displaced from the bellows and into the braid. This will ultimately cause failure of the braid to occur at a lower pressure as the length of the hoses increase due to more of the load being transmitted from the bellows and into the braid.

 
AdviserJeffrey Evans
SchoolTHE UNIVERSITY OF ALABAMA IN HUNTSVILLE
SourceMAI/ 49-03, p. , Jan 2011
Source TypeThesis
SubjectsAerospace engineering; Mechanical engineering
Publication Number1487677
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