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Advances in Structural Integrity Analysis Methods for Aging Metallic Airframe Structures with Local DamageAnalysis methodologies for predicting fatigue-crack growth from rivet holes in panels subjected to cyclic loads and for predicting the residual strength of aluminum fuselage structures with cracks and subjected to combined internal pressure and mechanical loads are described. The fatigue-crack growth analysis methodology is based on small-crack theory and a plasticity induced crack-closure model, and the effect of a corrosive environment on crack-growth rate is included. The residual strength analysis methodology is based on the critical crack-tip-opening-angle fracture criterion that characterizes the fracture behavior of a material of interest, and a geometric and material nonlinear finite element shell analysis code that performs the structural analysis of the fuselage structure of interest. The methodologies have been verified experimentally for structures ranging from laboratory coupons to full-scale structural components. Analytical and experimental results based on these methodologies are described and compared for laboratory coupons and flat panels, small-scale pressurized shells, and full-scale curved stiffened panels. The residual strength analysis methodology is sufficiently general to include the effects of multiple-site damage on structural behavior.
Document ID
20030019147
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
James H. Starnes, Jr.
(Langley Research Center Hampton, Virginia, United States)
James C. Newman, Jr.
(Langley Research Center Hampton, Virginia, United States)
Charles E. Harris
(Langley Research Center Hampton, Virginia, United States)
Robert S. Piascik
(Langley Research Center Hampton, Virginia, United States)
Richard D. Young
(Langley Research Center Hampton, Virginia, United States)
Cheryl A. Rose
(Langley Research Center Hampton, Virginia, United States)
Date Acquired
September 7, 2013
Publication Date
February 1, 2003
Publication Information
Publication: Ageing Mechanisms and Control Specialists' Meeting on Life Management Techniques for Ageing Air Vehicles
Publisher: Research and Technology Organisation/North Atlantic Treaty Organization
Subject Category
Aeronautics (General)
Meeting Information
Meeting: RTO Applied Vehicle Technology Panel (AVT) Specialists’ Meeting
Location: Manchester
Country: GB
Start Date: October 8, 2001
End Date: October 11, 2001
Sponsors: North Atlantic Treaty Organization
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
Keywords
fatigue-crack growth
critical crack-tip-opening-angle fracture criterion
residual strength analysis
nonlinear structural analysis
test-analysis correlation
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