Issue34

L. Marsavina et alii, Frattura ed Integrità Strutturale, 34 (2015) 387-396; DOI: 10.3221/IGF-ESIS.34.43

Figure 2 : Experimental set - up with details of ASCB specimen in three point bending grips (top right), respectively with SEC specimen in Arcan grips (left and middle right).

NECURON

Units of measure

Property

100

160

301

Density

kg/m 3

100.35±0.25* 145.53±0.22* 300.28±1.38*

MPa · m 0.5 MPa · m 0.5 MPa · m 0.5 MPa · m 0.5

Mode I fracture toughness (ASCB) Mode II fracture toughness (ASCB) Mode I fracture toughness (SEC) Mode II fracture toughness (SEC)

0.087 0.049 0.088 0.069

0.131 0.079 0.108 0.095

0.372 0.374 0.337

0.319 Table 6 : Material properties determined experimentally (* standard deviation values).

100 150 200 250 300 350

200

Density [kg/m 3 ]

300

ASCB Specimens 145 kg/m 3 density

300 145 100

150

2.66

4

100

6

8

145

12

Load [N]

50

100

30

Load [N]

0 50

0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

0.0

0.5

1.0

1.5

2.0

2.5

Displacement [mm]

Displacement [mm]

a) b) Figure 3 : Typical load - displacement curves: a) Influence of applied mixed mode for ASCB specimens; b) Influence of density for SEC specimens loaded in Mode I.

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