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RESEARCH PAPERS

Investigation of Weibull Statistics in Fracture Analysis of Cast Aluminum

[+] Author and Article Information
F. A. Holland, E. V. Zaretsky

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH 44135

J. Mech. Des 112(2), 246-254 (Jun 01, 1990) (9 pages) doi:10.1115/1.2912599 History: Received April 01, 1989; Online June 02, 2008

Abstract

The fracture strengths of two large batches of A357-T6 cast aluminum coupon specimens were compared by using two-parameter Weibull analysis. The minimum number of these specimens necessary to find the fracture strength of the material was determined. The applicability of three-parameter Weibull analysis was also investigated. A design methodology based on the combination of elementary stress analysis and Weibull statistical analysis is advanced and applied to the design of a spherical pressure vessel shell. The results from this design methodology are compared with results from the applicable ASME pressure vessel code.

Copyright © 1990 by The American Society of Mechanical Engineers
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