Issue 48

A.C. de Oliveria Miranda et alii, Frattura ed Integrità Strutturale, 48 (2019) 611-629; DOI: 10.3221/IGF-ESIS.48.59

  1.65 1.65 1 1.464 , r' 1 r r           1 1.464 1  2 1.48, r 1 1.08 0.4 , r' 1 r         2 1.23, r 1 1.08 0.15 , r 1 r         

, r' 1 

Q r

'( ')

(34)

 

, q c F r 

  

(35)

 

, q a F r 

  

(36)

When the imaginary crack depth a’ reaches 2.3  t , then Eq. (27) is used to model the subsequent 1D crack growth. Figs. 6 and 7 show the geometry factors of the SIF expressions in the c and a directions, calculated using the proposed expressions for corner quarter-elliptical cracks.

Figure 6 : Geometry factor in the c direction, for a corner crack on a rectangular plate with w/t  5.

Figure 7 : Geometry factor in the a direction, for a corner crack on a rectangular plate with w/t  5, assuming a  t if a’ > t .

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