Multimaterial Arbitrary-Lagrangian-Eulerian Formulation for Blast-Induced Fluid-Structure Interaction in Fiber-Metal Laminates

Abstract

DOI: 10.2514/1.J051168 Modelling the dynamic interaction of blast loading with primary aircraft structures is of great interest to both the military and civil sector as the threat of sabotage and terrorism increases. This paper examines and models the dynamic behavior of a fiber-metal laminate known as glass-fiber reinforced laminate (Glare) to dynamic loading based on experimental data using the arbitrary-Lagrangian–Eulerian multimaterial formulation in the explicit finite-element solver LS-DYNA. To validate the predictive methodology as well as to prove its ability to simulate complicated blast tests, two different scenarios were examined based on experimental data. The first examined the blastresponseof Glare flatpanelssubjected toanopen-airblast,andthesecond examinedtheblastpropagationin a pressurized cylindrical barrel. The predicted numerical results agree very well with those of experiments. This computationalapproachisabletoaccuratelypredicttherelevantaspectsoftheblast–structureinteractionproblem, includingtheblastwavepropagationinthemediumforpressurizedloadingcasesandtheresponseofthestructureto blast loading.