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The plot of the North Pole deflection amplitude versus time for four pressures, (a). Deflection versus time curve for 0.5 MPa pressure (b). Deformation sequence under 0.5 MPa pressure at the extended time scale of the initial 0.005 µs, (c). The numerical simulation stops when the dimple amplitude caused internal contacts, giving rise to large tensile strain at the high-curvature crease.
