The paper will present an overview of a new EU project CELPACT whose main objective is the development and design of new cellular materials and twin skinned sandwich structures made from hybrid composites and metals. CELPACT is developing fabrication technology for cellular metals based on selective laser melting of periodic cellular cores and new fabrication concepts for hybrid composite sandwich structures with folded structural composite cores. To support the materials developments, computational methods are being developed based on micromechanics cell models with multiscale modelling techniques for understanding progressive damage and collapse mechanisms for use in structural analysis. Impact performance is critical for sandwich aircraft structures and the simulation tools are being used to design efficient impact resistant aircraft structures. Structural integrity of these advanced cellular structures are being assessed by dynamic materials tests and gas gun impact tests on cellular beam and panel structures under high velocity impact conditions relevant to aircraft structures.
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