PSI - Issue 42

Hasan Saeed et al. / Procedia Structural Integrity 42 (2022) 967–976 Hasan et al./ Structural Integrity Procedia 00 (2022) 000 – 000

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Fig. 3. Strain range at back-face obtained from FEA as function of / ratio.

2.2. Extended back-face strain compliance Inspired by the work of Newman et al (J. Newman et al., 2011), the BFS compliance is characterized as the non dimensional strain compliance function ′ . ′ = ( ) ( 1 ) Here, is the back-face strain, is Young ’ s modulus and is the applied stress range. Fig. 4 shows the back-face strain (BFS) compliance obtained numerically for crack length to width ratios 0.05 ≤ / ≤ 0.6 .

Fig. 4 Crack length ratio / versus non-dimensional back-face strain compliance function ′ .