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A method for determining local elastoplastic stress and strain in metallurgically bonded notched laminates subjected to a loading cycleA semianalytical method was developed for determining elastoplastic cyclic stresses and strains at notch roots in metallurgically bonded metal laminates. The method is based on the Neuber equation, which was used with an effective stress-strain curve for the laminate. It was applied to laminates containing a circular hole which were subjected to one cycle of reversed loading. The laminates consisted of two elasto-perfectly-plastic materials with different yield strengths and with either equal or different Young's moduli. A laminate of high-strength titanium alloy with alternate layers of commercially pure titanium was also analyzed. The accuracy of the method was evaluated by comparing the stresses and strains with those calculated from a finite-element analysis. The results estimated by the simple method based on the Neuber equation agreed closely with the results computed from the more elaborate finite-element analysis.
Document ID
19740027194
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Sova, J. A. (NASA Langley Research Center Hampton, VA, United States)
Crews, J. H., Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
L-9753
NASA-TN-D-7766
Accession Number
74N35307
Funding Number(s)
PROJECT: RTOP 501-22-02-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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