Study on Crack Propagation of the Tunnel Model under Dynamic Loading

<div>Crack-tip displacement and velocity versus time under different impact speed conditions. (a) Crack-tip displacement versus time under different impact speed conditions. (b) Crack velocity versus time under different impact speed conditions.</div>

Advances in Materials Science and Engineering

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Figure 11

Figure 11: Study on Crack Propagation of the Tunnel Model under Dynamic Loading 