PSI - Issue 28
Koji Uenishi et al. / Procedia Structural Integrity 28 (2020) 2072–2077 Uenishi et al./ Structural Integrity Procedia 00 (2020) 000 – 000
2075
4
10 mm
Tensile loading
Initiation of the secondary fracture
Branched primary fracture
Total split of the specimen
Primary fracture
0
20
40
60
80
100 [ s]
Arrest of the secondary fracture
140
180
220
260
300
340 [ s]
Resumption of propagation of the secondary fracture
Total split of the specimen by the secondary fracture
3
2
1
2
360
380
400
420 [ s]
Fig. 3. Fracture evolution in a specimen illustrated in Fig. 1b, with the uniaxially applied tensile strain rate of 1.3 10 − 2 /s. Surprisingly, the secondary fracture, initiated upon a total split of the primary fracture, resumes its propagation after some 200 s of arrest. This behaviour of the secondary fracture cannot be foreseen from the global relation, Fig. 2. The time elapsed after the left-top snapshot is shown beneath each picture.
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