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Three-dimensional elastic-plastic analysis of shallow cracks in single-edge-crack-tension specimensThree dimensional, elastic-plastic, finite element results are presented for single-edge crack-tension specimens with several shallow crack-length-to-width ratios (0.05 less than or equal to a/W less than or equal to 0.5). Results showed the need to model the initial yield plateau in the stress-strain behavior to accurately model deformation of the A36 steel specimens. The crack-tip-opening-displacement was found to be linearly proportional to the crack-mouth-opening displacement. A new deformation dependent plastic-eta factor equation is presented for calculating the J-integral from test load-displacement records. This equation was shown to be accurate for all crack lengths considered.
Document ID
19900011814
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Shivakumar, Kunigal N.
(Analytical Services and Materials, Inc., Hampton VA., United States)
Newman, James C., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1990
Subject Category
Composite Materials
Report/Patent Number
NASA-TM-102636
NAS 1.15:102636
Accession Number
90N21130
Funding Number(s)
PROJECT: RTOP 505-63-01-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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