On the influence of filling level in CFRP aircraft fuel tank subjected to high velocity impacts

Abstract In this work, the process of impact that takes place in a partially filled tank is analyzed, performing a numerical simulation, in order to understand the response of the composite laminated structure. The commercial finite-element code LS-DYNA v.R7 has been used to simulate an Hydrodynamic RAM event created by a steel spherical projectile impacting a partially water-filled woven CFRP square tube using two different approaches (MM-ALE and SPH). The intralaminar and interlaminar damage have been taken into account implementing an user subroutine and by means of a cohesive interaction, respectively. Once the numerical model is validated using available experimental data, the effect of the filling level in the failure of the tank is analyzed in detail taking advantage of the information provided by the numerical model.

[1]  D. Varas,et al.  Numerical modelling of the hydrodynamic ram phenomenon , 2009 .

[2]  C. Navarro,et al.  Experimental and numerical analysis of normal and oblique ballistic impacts on thin carbon/epoxy woven laminates , 2008 .

[3]  D. Varas,et al.  Experimental study of CFRP fluid-filled tubes subjected to high-velocity impact , 2011 .

[4]  Constantinos Soutis,et al.  Modelling damage evolution in composite laminates subjected to low velocity impact , 2012 .

[5]  Alessandro Airoldi,et al.  Modelling of impact forces and pressures in Lagrangian bird strike analyses , 2006 .

[6]  Pedro P. Camanho,et al.  Accurate simulation of delamination growth under mixed-mode loading using cohesive elements: Definition of interlaminar strengths and elastic stiffness , 2010 .

[7]  P. Camanho,et al.  Mixed-Mode Decohesion Finite Elements for the Simulation of Delamination in Composite Materials , 2002 .

[8]  Stephen R Hallett,et al.  Prediction of impact damage in composite plates , 2000 .

[9]  Marco Anghileri,et al.  A survey of numerical models for hail impact analysis using explicit finite element codes , 2005 .

[10]  Pedro P. Camanho,et al.  Simulation of drop-weight impact and compression after impact tests on composite laminates , 2012 .

[11]  R. Zaera,et al.  An analytical model for high velocity impacts on thin CFRPs woven laminated plates , 2007 .

[12]  Altair,et al.  Simulation and Validation of UNDEX Phenomena Relating to Axisymmetric Structures , .

[13]  R. S. Birch,et al.  Impact of aircraft rubber tyre fragments on aluminium alloy plates: I—Experimental , 2007 .

[14]  D. Varas,et al.  Numerical modeling of ice behavior under high velocity impacts , 2012 .

[15]  D. Varas,et al.  Numerical analysis of CFRP fluid-filled tubes subjected to high-velocity impact , 2013 .

[16]  D. Varas,et al.  Analysis of high velocity impacts of steel cylinders on thin carbon/epoxy woven laminates , 2013 .

[17]  R. Zaera,et al.  High energy impact on woven laminates , 2003 .