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Cellular Solids (cellular + solid)
Selected AbstractsCompressive Behavior of Pyramidal, Tetrahedral, and Strut-Reinforced Tetrahedral ABS and Electroplated Cellular Solids,ADVANCED ENGINEERING MATERIALS, Issue 1-2 2009Samuel Markkula Fused deposition modeling combined with electroplating provides a novel manufacturing methodology for building low relative density engineered cellular topologies. Here the mechanical performance of tetrahedral, pyramidal, and strut-reinforced tetrahedral cellular solids manufactured from multiphase nickel-copper-ABS is studied. The novel processing and geometric optimization places these engineered topologies into an unoccupied location in the material universe. [source] Negative Poisson's Ratio Behavior Induced by an Elastic InstabilityADVANCED MATERIALS, Issue 3 2010Katia Bertoldi Negative Poisson's ratio behavior has been uncovered in cellular solids that comprise a solid matrix with a square array of circular voids. The simplicity of the fabrication implies robust behavior, which is relevant over a range of scales. The behavior results from an elastic instability, which induces a pattern transformation and excellent quantitative agreement is found between calculation and experiment. [source] Theory and numerics of geometrically non-linear open system mechanicsINTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Issue 11 2003E. Kuhl Abstract The present contribution aims at deriving a general theoretical and numerical framework for open system thermodynamics. The balance equations for open systems differ from the classical balance equations by additional terms arising from possible local changes in mass. In contrast to existing formulations, these changes not only originate from additional mass sources or sinks but also from a possible in- or outflux of matter. Constitutive equations for the mass source and the mass flux are discussed for the particular model problem of bone remodelling in hard tissue mechanics. Particular emphasis is dedicated to the spatial discretization of the coupled system of the balance of mass and momentum. To this end we suggest a geometrically non-linear monolithic finite element based solution technique introducing the density and the deformation map as primary unknowns. It is supplemented by the consistent linearization of the governing equations. The resulting algorithm is validated qualitatively for classical examples from structural mechanics as well as for biomechanical applications with particular focus on the functional adaption of bones. It turns out that, owing to the additional incorporation of the mass flux, the proposed model is able to simulate size effects typically encountered in microstructural materials such as open-pored cellular solids, e.g. bones. Copyright © 2003 John Wiley & Sons, Ltd. [source] Sub-Micrometer Scale Periodic Porous Cellular Structures: Microframes Prepared by Holographic Interference Lithography,ADVANCED MATERIALS, Issue 22 2007M. Maldovan The ubiquity of multifunctional cellular solids in both natural and engineered materials is a clear indication of the importance of such materials. The mechanical behavior of these structures is the most common critical functionality across different applications. In this Communication, we establish the effective elastic properties of periodic bicontinuous solid/air structures that can be fabricated at small length scales by interference lithography and compare their properties with standard models. [source] | ||||||||||