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Stress intensity factors for an inclined crack in an orthotropic stripThe elastostatic problem for an infinite orthotropic strip containing a crack is considered. It is assumed that the orthogonal axes of material orthotropy may have an arbitrary angular orientation with respect to the orthogonal axes of geometric symmetry of the uncracked strip. The crack is located along an axis of orthotropy, hence at an arbitrary angle with respect to the sides of the strip. The general problem is formulated in terms of a system of singular integral equations for arbitrary crack surface tractions. As examples Modes I and II stress intensity factors are calculated for the strip having an internal or an edge crack with various lengths and angular orientations. In most calculations uniform tension or uniform bending away from the crack region is used as the external load. Limited results are also given for uniform normal or shear tractions on the crack surface.
Document ID
19790003986
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Delale, F. (Istanbul Macka Technical Univ. Bethlehem, PA, United States)
Bakirtas, I. (Istanbul Macka Technical Univ.)
Erdogan, F. (Lehigh Univ.)
Date Acquired
September 3, 2013
Publication Date
April 1, 1978
Subject Category
Composite Materials
Report/Patent Number
NASA-CR-157141
Accession Number
79N12157
Funding Number(s)
CONTRACT_GRANT: NGR-39-007-011
CONTRACT_GRANT: NSF ENG-77-19127
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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