13th International Conference on Fracture June 16–21, 2013, Beijing, China -6- (a) (b) Figure 3. Length 1 1.5 Time 1.5 3.9 3.9 6.3 8.7 6.3 8.7 Free surface Rupture direction; c ~ 0.7 cS Rupture direction; speed c ~ 0.7 cS Rupture front wave Singularity at the tip S2 S1 Arrested Sh Pf Arrested Rh Rf Sf SS S2 R R Sf Sh Pf Rh Rf SS S2 R R Sf Sh Rh Rf
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