Significance of Large Scatter of Composite Properties to Aircraft Reliability.
Abstract
Statistical calculations have been made for the static load reliability of an aircraft fleet assuming typical metalic and composite strength distributions. A factor of safety is defined as the element strength divided by the 'weakest of the fleet' strength. Element strength is typical 'A' or 'B' basis material allowables. 'Weakest of the fleet' strength is calculated statistically assuming each aircraft to be made up of a realistic arrangement (in-series or in-parallel) of critical elements. Similar calculations are also made for fatigue life. It is shown that the reliability of the current damage tolerant design, such as multiple load path and crack stoppers, can be specified in quantitative terms. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1979
- Accession Number
- ADA077804
Entities
People
- Pei Chi Chou
- Robert Croman
Organizations
- Drexel University