Fig. 6

a Comparison of Mode I, K\(_{\mathrm {I}}\) crack depth \(=\) 4 mm, rotational velocity\(\,=\,\) 500 rad/s. b Comparison of Mode II, K\(_{\mathrm {II}}\), crack depth \(=\) 4 mm, rotational velocity\(\,=\,\) 500 rad/s. c Comparison of Mode III, K\(_{\mathrm {III}}\), crack depth \(=\) 4 mm, rotational velocity\(\,=\,\)500 rad/s