Issue 70

H. Siguerdjidjene et alii, Frattura ed Integrità Strutturale, 70 (2024) 1-23; DOI: 10.3221/IGF-ESIS.70.01

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FGM-AL/SiC Notched Plate (n=2.0) and H=2.00 mm

r=1.66 mm r=2.50 mm r=3.34 mm r=4.16 mm r=5.00 mm

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Load (KN)

Initial crack r=1.66 mm r=2.50 mm r=3.34 mm r=4.16 mm r=5.00 mm

Crack length (mm)

2

2

0,00 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50 0 0

Displacement (mm)

Figure 13: Load-displacement response and crack length of FGM by n=2.0

Figure 14: Critical crack length with stress field of an FGM Al/SiC plate for n=2 and different notch diameters a) ceramic rich side, b) metal rich side It is clearly noticeable that the structure is quickly damaged when the dimension of the notch is important but in a different way under the effect of the value of the exponent n. Indeed, the more the structure is fragile in gradation, the more the damage occurs at higher forces and lower displacements. This behaviour can be explained by the appearance of the plastic part of the three previous results. It can also be found that, the smaller the notch size, the greater the critical crack length

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