Accession Number : ADB112326


Title :   Certification Testing Methodology for Composite Structure. Volume 2. Methodology Development


Descriptive Note : Final rept. Mar 84-Dec 85


Corporate Author : NORTHROP CORP HAWTHORNE CA AIRCRAFT DIV


Personal Author(s) : Whitehead, R S ; Kan, H P ; Cordero, R ; Saether, E S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/b112326.pdf


Report Date : Oct 1986


Pagination or Media Count : 293


Abstract : This research developed a certification testing methodology for composite structures. The existing composite static strength and fatigue life data are analyzed statistically to determine the influence of test parameters on the scatter of composite data. Guidelines to use the composite data scatter in structural certification are recommended. Various approaches to composite structures certification are analytically evaluated. The approaches evaluated are: scatter factor approach, load enhancement factor approach, ultimate strength approach and change in spectrum approach. The capability, advantages and disadvantages of each approach to determine the minimum life and/or strength are fully discussed. (Keywords): Certification; Composite Materials; Aircraft Structures; Fatigue.


Descriptors :   *COMPOSITE STRUCTURES , ACCEPTANCE TESTS , WEIBULL DENSITY FUNCTIONS , AIRCRAFT , COST EFFECTIVENESS , FATIGUE LIFE , COMPOSITE MATERIALS , LAMINATES , LOADS(FORCES) , AIRFOILS , STRENGTH(MECHANICS) , SPECTRA , DATA REDUCTION , STRENGTH(GENERAL) , AIRFRAMES , STATICS , STATIC TESTS , METAL COMPLEXES


Subject Categories : Aircraft
      Laminates and Composite Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE