Theoretical and Experimental Research on the Fatigue Behaviour of Cracked Stiffened Panels.
Abstract
The report presents the results of research performed on the behavior of cracked, riveted, stiffened panels undergoing constant amplitude fatigue loading. The objectives of the research were twofold: (1) to evaluate the K rate relationship in riveted stiffened panels, and (2) to determine the fatigue endurance of the stringer as function of the crack length in the sheet. The stress intensity factor as well as the overloading of the stringers was evaluated through a computer program which was based on the finite element method. A rationale was further developed to determine the fatigue endurance of the stringers as function of the crack length in the sheet. Rates of fatigue crack growth as well as fatigue endurance of stringers were measured on 40 stiffened panels made of 2024-T3 and 7075-T6 aluminum alloy sheet. Panel dimensions, stringer geometry and stringer spacing were varied systematically. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1973
- Accession Number
- AD0769948
Entities
People
- A. Frediani
- A. Salvetti
- E. Grassi
Organizations
- University of Pisa