Issue 67

S. S. E. Ahmad et al., Frattura ed Integrità Strutturale, 67 (2024) 24-42; DOI: 10.3221/IGF-ESIS.67.03

b =120

b =250

Thickness (mm)

a/d

0

0.1

0.2

0.3

0

0.1

0.2

0.3

First crack loading, kN

40.12 29.61 23.15 18.22 138.39 123.40 106.53 100.38 70.95 68.49 56.87 55.90 189.05 187.00 104.11 102.71

Steel stress at first crack, MPa

Table 7: First crack loading and steel stress at first crack.

a) beam width 120 mm b) beam width 250 mm Figure 12 : Numerical load-deflection relationship; a) beam width 120 mm b) beam width 250 mm.

Figure 13: Numerical K 1C against a/d for specimens’ width b = 120 and 250 mm

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