Non-linear oscillations of an elastic shell controlled by the interface pressure

▶ An weak oscillatory and irregular behavior which can conduct to the final collapse of the solid. ▶ We can see that spike oscillations resembles an accumulative elastic behavior. ▶ The absence of oscillations with a sudden collapse indicates how the problem reaches a critical situation. ▶ The ever growing rate of deformation can only be explained by a cumulative elastic rate of deformation in time.