Response of preloaded thin composite panels subjected to underwater explosive loading

The effect of preloading on thin composite plates subjected to underwater explosive loading has been studied through computational simulations. In this study the effects of three types of in plane preloading are considered: (1) directly applied compression, (2) indirectly applied compression, and (3) directly applied tension. The effects of the preloading conditions are assessed using the plate center point deflection, material damage, and delamination evolution. The results show that for thin composite plates subjected to underwater shock loading conditions there is a minimal effect of preload on the response of the plates or the amount of damage and delamination sustained.

► A validated model was used to predict the effects of preload on composite panels. ► Three types of in-plane preloads were modeled. ► The panels were subjected to a simulated underwater explosive loading. ► Preload had little effect on predicted response, damage or delamination.