PSI - Issue 82

Koji Uenishi et al. / Procedia Structural Integrity 82 (2026) 72–78 Uenishi et al. / Structural Integrity Procedia 00 (2026) 000–000

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Amplified stress due to advancing axe

0 ms

0.160 ms

0.230 ms

0.290 ms

0.380 ms

0.385 ms

0.410 ms

0.425 ms

0.800 ms

0.815 ms

0.830 ms

0.845 ms

0.860 ms

1.960 ms

2.850 ms

3.085 ms

3.445 ms

3.745 ms

3.780 ms

4.490 ms

5.140 ms

5.150 ms

5.155 ms

5.165 ms

5.170 ms

5.175 ms

5.185 ms

5.205 ms

Fig. 2. Dynamic fracture (splitting) of a polycarbonate specimen along a single straight perforation line shown in Fig. 1(a), subjected to vertical dynamic impact from bottom and action of the “axe” moving downwards [unit: mm]. The isochromatic fringe patterns (contours of the maximum in-plane shear stress) are recorded photoelastically using a high-speed video camera at a frame rate of 200,000 frames per second (fps).