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Frequency domain analysis of the random loading of cracked panelsThe primary effort concerned the development of analytical methods for the accurate prediction of the effect of random loading on a panel with a crack. Of particular concern was the influence of frequency on the stress intensity factor behavior. Many modern structures, such as those found in advanced aircraft, are lightweight and susceptible to critical vibrations, and consequently dynamic response plays a very important role in their analysis. The presence of flaws and cracks can have catastrophic consequences. The stress intensity factor, K, emerges as a very significant parameter that characterizes the crack behavior. In analyzing the dynamic response of panels that contain cracks, the finite element method is used, but because this type of problem is inherently computationally intensive, a number of ways of calculating K more efficiently are explored.
Document ID
19940031467
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Doyle, James F.
(Purdue Univ. West Lafayette, IN, United States)
Date Acquired
September 6, 2013
Publication Date
June 16, 1994
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.26:196021
NASA-CR-196021
Accession Number
94N35974
Funding Number(s)
CONTRACT_GRANT: NAG1-1173
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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