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Calculation of stress intensity factors in an isotropic multicracked plate: Part 2: Symbolic/numeric implementation
- Publication Year :
- 1992
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1992.
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Abstract
- Analytical derivations of stress intensity factors (SIF's) of a multicracked plate can be complex and tedious. Recent advances, however, in intelligent application of symbolic computation can overcome these difficulties and provide the means to rigorously and efficiently analyze this class of problems. Here, the symbolic algorithm required to implement the methodology described in Part 1 is presented. The special problem-oriented symbolic functions to derive the fundamental kernels are described, and the associated automatically generated FORTRAN subroutines are given. As a result, a symbolic/FORTRAN package named SYMFRAC, capable of providing accurate SIF's at each crack tip, was developed and validated. Simple illustrative examples using SYMFRAC show the potential of the present approach for predicting the macrocrack propagation path due to existing microcracks in the vicinity of a macrocrack tip, when the influence of the microcrack's location, orientation, size, and interaction are taken into account.
- Subjects :
- Structural Mechanics
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Notes :
- RTOP 510-01-50
- Publication Type :
- Report
- Accession number :
- edsnas.19930001265
- Document Type :
- Report