TRANSIENT RESPONSE OF E-GLASS / VINYL-ESTER PLATES SUBJECTED TO UNDERWATER EXPLOSIONS: EXPERIMENTAL AND COMPUTATIONAL COMPARISONS

摘要

The effect of underwater shock loading on an E-Glass / Vinyl-Ester composite material has beenrnstudied. The work consists of experimental testing, utilizing a water filled conical shock tubernand computational simulations, utilizing the commercially available LS-DYNA finite elementrncode. The plates consist of elliptically curved geometry with 0/90 biaxial laminates. The platesrnare held with fully clamped boundary conditions and are subjected to underwater explosivern(UNDEX) loading. The transient response of the plates is captured in real time through the usernof a Digital Image Correlation (DIC) system. The DIC data and computational results show arnhigh level of correlation for both the plate deformation and velocity histories using the Russellrnerror measure. The finite element models are also shown to be able to simulate the onset ofrndelamination mechanisms.