LAUSR

Abstract This paper deals with the transient response of a glass-epoxy composite submersible hull subjected to underwater explosive shock and bubble. The physical process of the underwater explosive shock and the subsequent bubble evolution in the fluid is simulated by using the Multi-Material Arbitrary Lagrange Euler (ALE) formulation. The interaction of the composite submersible hull with the complex fluid is handled by the penalty contact algorithm. With the present approach, the investigation of the composite submersible hull subjected to underwater explosion can be accomplished, which accommodates both the shock and bubble phenomenon with the different time scales as it occurs in the actual underwater explosion event; and furthermore the transient responses (such as strains and internal energy densities) of the composite submersible hull to the underwater explosive shock and bubble can be predicted for different charge weights and charge distances. In addition, a comparison between the transient responses of the composite submersible hull and a steel submersible hull for the underwater shock and the subsequent bubble is made.