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Preface Hydroelastic Impacts of DeformableWedges Riccardo Panciroli Blast Loading of Sandwich Structures and Composite Tubes H. Arora, P. Hooper, and John P. Dear Interaction of Underwater Blasts and Submerged Structures S. Abrate Compressively Pre-stressed Navy Relevant Laminated and Sandwich Composites Subjected to Ballistic Impact Eric Kerr-Anderson, Selvum Pillay, Basir Shafiq, and Uday K. Vaidya Development of a Test to Simulate Wave Impact on Composite Sandwich Marine Structure Peter Davies, Benoit Bigourdan, Dominique Choqueuse, Nicolas Lacotte, and Bertrand Forest Damage Mechanisms and Energy Absorption in Composite Laminates Under Low Velocity Impact Loads V. Lopresto and G. Caprino Perforation of Composite Laminate Subjected to Dynamic Loads Shirley Kalamis Garcia-Castillo, Sonia Sanchez-Saez, Carlos Santiuste, Carlos Navarro, and Enrique Barbero Discrete Impact Modeling of Inter- and Intra-laminar Failure in Composites Christophe Bouvet, N. Hongkarnjanakul, S. Rivallant, and J.J. Barrau High Velocity Hail Impact on Composite Laminates - Modelling and Testing Robin Olsson, Rickard Juntikka, and Leif Asp Discrete Modeling of the Crushing of Nomex Honeycomb Core and Application to Impact and Post-impact Behavior of Sandwich Structures Bruno Castanie, Yulfian Aminanda, Jean-Jacques Barrau, and Pascal Thevenet Foldcore Sandwich Structures and Their Impact Behaviour: An Overview Sebastian Heimbs Experimental and Numerical Study of Normal and Oblique Impacts on Helicopter Blades J. Aubry, P. Navarro, I. Tawk, S. Marguet, J.F. Ferrero, S. Lemaire, and P. Rauch Energy Absorbing Sacrificial Structures Made of Composite Material for Vehicle Crash Design G. Belingardi, S. Boria, and J. Obradovic Composites and Dynamic Failures: Experimental and Numerical Solving Strategies and Solutions Daniel Coutellier J. Aubry, P. Navarro, I. Tawk, S. Marguet, J.F. Ferrero, S. Lemaire, and P. Rauch Energy Absorbing Sacrificial Structures Made of Composite Material for Vehicle Crash Design G. Belingardi, S. Boria, and J. Obradovic Composites and Dynamic Failures: Experimental and Numerical Solving Strategies and Solutions Daniel Coutellier J. Aubry, P. Navarro, I. Tawk, S. Marguet, J.F. Ferrero, S. Lemaire, and P. Rauch Energy Absorbing Sacrificial Structures Made of Composite Material for Vehicle Crash Design G. Belingardi, S. Boria, and J. Obradovic Composites and Dynamic Failures: Experimental and Numerical Solving Strategies and Solutions Daniel Coutellier

The design of some modern ultra-light weight aicraft or helicopter structures uses the dissymmetrical sandwich technology. In this kind of design, stresses are taken by the thick skin of the sandwich known as working skin and made of multilayered carbon. The behaviour with global buckling is fulfilled by the core and a thin skin known as stabilizing skin made of two carbon or Kevlar layers. The certification of such structures rests partly on monoaxial tests in compression or shear with deformable square of representative test plates, or on tests under complex stresses of complete substructures. The purpose of this study is on one hand to build an original way of testing which would be able to test representative plates under uniaxial compression, shear and combined compression/shear loading, and on the other hand to build a specific non-linear theory with the associated program able to describe the behaviour of the real plates.

International audience; The constraints related to structures design in the field of transportation are increasingly complex in order to comply with safety standards. Composite materials being increasingly widespread within these structures, their behavior must therefore be more accurately mastered. Current numerical tools can now permit an accurate simulation in the static field, but concerning fast transient problems, the available numerical methods are not optimal yet. Starting from concrete cases, this chapter introduces problem solving strategies. A procedure is then presented to improve numerical simulations in the field of rapid dynamics. It includes the establishment of experimental protocols to assist in a thorough understanding of materials behavior. These experimental studies can then provide models, laws and methodologies to better simulate the behavior of composite structures under dynamic load. However experimentation is sometimes complicated by the size of structures. The similitude techniques can then provide a solution. Similitude techniques are used to study composite materials subjected to impact. We propose here an approach allowing modeling and numerical simulation validated on an industrial case.