Numerical Simulation of Damage of Aluminium Plate Subjected to Underwater Explosion
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Abstract
The numerical simulation performed on an aluminium plate of dimension 550*450*4 mm subjected to underwater explosion using finite element code LS-DYNA is presented in this paper. The box model setup along with the test plate is modelled using Lagrangian solid elements, the fluid and explosive are modelled using Eulerian solid elements with Gruneisan and Jones-Wilkins-Lee equation of state respectively. The fluid structure interactions are modelled using ALE coupling. Numerical simulation has been carried out for the aluminium plate under shock loads for various charge weights ranging from 30 to 60 g in steps of 10 g. The results of permanent deformation of aluminium plate for each shock factors are compared with the counterpart mild steel plates under the same conditions available in the literature.
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