13th International Conference on Fracture June 16–21, 2013, Beijing, China -4- (a) (b) Figure 2. PS PS SS Free surface 1.5 Time 1.5 Length 1 R R 3.9 3.9 6.3 8.7 6.3 8.7 S P PS Sh S Rh Rf Sf S S S S S S SS S S Static singularities R R Sf Sh Pf S S Rh Rf SS S S S R R Sf Sh S S
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