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S. Keck et alii, Frattura ed Integrità Strutturale, 34 (2015) 371-378; DOI: 10.3221/IGF-ESIS.34.41 376 Figure 7 : Fatigue crack growth rate data for compact tension specimens (90° fibre direction, R = 0.1). Figure 8 : Fatigue crack growth rate data for compact tension specimens (45° fibre direction, R = 0.1). Figure 9 : Fatigue crack growth rate data for compact tension specimen (0° fibre direction, R = 0.1).