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Structure-Property Linkages of Aluminum Foams

This progress report explores the structure-property linkages of aluminum foams, focusing on elastic mechanical properties and their correlations with thermal properties. The goal is to establish correlations between the C11 component of the elastic stiffness tensor and previously found thermal conductivity. The study utilizes data from foam samples, generating Voronoi diagrams to analyze foam structures and conducting elastic simulations using Abaqus software. This research aims to enhance understanding of aluminum foams and their applications.

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Structure-Property Linkages of Aluminum Foams

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  1. Structure-Property Linkages of Aluminum Foams Marshall Johnson Materials Informatics – Progress Report 1

  2. Why Metal Foams? • Low density • Favorable properties • Mechanical • Thermal • Electrical • Acoustic • Applications • High surface-area applications, vibration resistance, energy absorption 1

  3. Previous Work • Modeling of effective thermal conductivity (λeff) for open cell aluminum foam • Room for improvement? • Reasonable to want both excellent thermal & mechanical properties – how do these correlate? 2

  4. Goals • Structure-property linkages with elastic mechanical properties • Initial Goal: C11 component of elastic stiffness tensor • Correlations between elastic properties and thermal properties

  5. Dataset • Generation • Optimally pack domain of spheres, generate Voronoi diagram from sphere’s centers • Use Voronoi diagram triple points to form edges, quadruple points form junctions • 3507, 100x100x100 foam samples 1 2 2

  6. Example Foam Structures • 5 Structural Properties • Pore size • Ligament thickness

  7. Methodology • Foam data in form of Matlab data file • Convert to Abaqus input files • Elastic simulations for C11 component of stiffness tensor • Treat as 2-phase material • Periodic boundary conditions • Structure-Property linkage for C11 component • Correlations between previously found thermal conductivity & C11 stiffness component

  8. References • Manufacturing Talk Radio, Metal Foam: A Wonder Material • A. August et. al. Prediction of heat conduction in open-cell foams via the diffuse interface representation of the phase-field method

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