Numerical investigation of stiffness and buckling response of simple and optimized infill structures

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This study systematically investigates stiffness and buckling response of finite structures consisting of repeated unit cells of a reference truss lattice microstructure and a topology optimized microstructure with enhanced buckling strength. Structural stability is evaluated using linear buckling, nonlinear pre-buckling, and post-buckling analyses, subjected to two benchmark loading cases representing uniaxial compression and shear loading. Numerical results indicate that geometric and material nonlinearities play a surprisingly small role in uniaxial loading, whereas strong effects are seen for the shear loading case for which the microstructure was not optimized.
Original languageEnglish
JournalStructural and Multidisciplinary Optimization
Publication statusAccepted/In press - 2020


  • Structural stability
  • Finite periodic structures
  • Linear buckling analysis
  • Nonlinear pre-buckling analysis
  • Post-buckling analysis

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