Cracks at structural holes
Metals and Ceramics Information Center, 1975 - Technology & Engineering - 44 pages
The report reviews the state of the art of dealing with cracks at holes in engineering structures. The problem of interaction of cracks and holes is considered in its broadest sense. The usefulness of existing analysis and their limitation are discussed. Also surveyed are problems worthy of future research effort.
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30 mm dio analysis methods applied Bowie analysis Bowie function Bowie solution calculated capability of holes central crack configurations corner cracks correction factors crack detection crack front crack growth crack passes crack runs crack tip crack-growth curve CRACK-GROWTH RATES crack-propagation cracked hole cracks at holes CRACKS EMANATING critical crack crock dio hole EFFECT OF FASTENERS effective crack elliptical crack elliptical flaws emanating from holes fastener hole fatigue crack Figure 17 Figure 23 finite element analysis flaws at holes fracture mechanics fracture toughness geometry growth rates Hall and Engstrom Hall and Finger hole diameter hoop stress initial flaw shapes intensity factors interference fasteners interference fit load transfer loaded hole mandrelized holes material occur open hole panel parameters problem quarter-circular reduction residual strength residual stresses retardation single crack specimens STOP HOLES stress concentration stress intensity stress-intensity factor stringer failure structural holes surface flaws symmetric test program