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Mixed mode stress intensity factors for semielliptical surface cracksThe three-dimensional equations of elasticity are solved for a flat elliptical crack which has nonuniform shear stresses applied to its surfaces. An alternating method is used to determine the mode two and mode three stress intensity factors for a semielliptical surface crack in the surface of a finite thickness solid. These stress intensity factors are presented as a function of position along the crack border for a number of crack shapes and crack depths. This same technique is followed to determine the mode one stress intensity factors for the semielliptical surface crack which has normal loading applied to its surface. Mode one stress intensity factors are presented and compared with the results obtained from previous work.
Document ID
19740026256
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Smith, F. W. (Colorado State Univ. Fort Collins, CO, United States)
Sorensen, D. R. (Colorado State Univ. Fort Collins, CO, United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
NASA-CR-134684
Accession Number
74N34369
Funding Number(s)
CONTRACT_GRANT: NGL-06-002-063
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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