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Optimizing the microstructure of dissipative materials

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  • The Aim Of This Work Is To Present A Method To Design Material Microstructures With High Dissipation
  • In Order To Compute The Macroscopic Energy Dissipation In Periodic Structures
  • We Focus Both On Capturing The Physical Dissipation Mechanism And To Find The Effective Macroscopic
  • The Effective Elastic Material Properties Of A Periodic Structure Can Be Found Numerically Using Hom
  • G
  • (Guedes And Kikuchi
  • 1990)
  • For Dissipative Materials A Quasi-Static Approach Can Be Used To Find The Homogenized Complex Elasti
  • And Thereby The Material’S Loss Factor
  • However
  • Only For Large Wave Lengths (Small Wave Numbers) And Constant Material Parameters (Andreasen Et Al
  • 2012)
  • An Alternative Way To Determine The Material’S Loss Factor Is To Consider The Material’S Band Diagra
  • 1992)
  • From Which The Loss Factor Can Be Deduced
  • Designs Obtained By E
  • G
  • Maximizing The Material’S Loss Factor For A Given Frequency Range Will Be Presented
  • The Method Will Be Demonstrated Both Using Base Cells Consisting Of Continuum Elements And Base Cell
  • The Beam Element Base Cell Is Included With Inspiration From Experimental Results In (Schaedler
  • 2011)
  • Where A Highly Energy Absorbing Material
  • Constructed From Structural Elements With A Small Cross Sectional Area But Large Area Moment Of Iner
  • Is Presented
  • Furthermore
  • The Applicability Of Multiscale Finite Element Methods (Efendiev
  • 2009) To Account For Boundary Conditions Of Periodic Structures That Possess A Finite Extent Is Inve
  • Design
  • Mathematics


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