3D architected isotropic materials with tunable stiffness and buckling strength

Fengwen Wang*, O. Sigmund

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper presents a class of 3D single-scale isotropic materials with tunable stiffness and buckling strength obtained via topology optimization and subsequent shape optimization. Compared to stiffness-optimal closed-cell plate material, the material class reduces the Young's modulus to a range from 79% to 58%, but improves the uniaxial buckling strength to a range from 180% to 767%. Based on small deformation theory, material stiffness is evaluated using the homogenization method. Buckling strength under a given macroscopic stress state is estimated using linear buckling analysis with Block–Floquet boundary conditions to capture both short and long wavelength buckling modes. The 3D isotropic single-scale materials with tunable properties are designed using topology optimization, and are then further simplified using shape optimization. Both topology and shape optimized results demonstrate that material buckling strength can be significantly enhanced by hybrids between truss and variable thickness plate structures.

Original languageEnglish
Article number104415
JournalJournal of the Mechanics and Physics of Solids
Volume152
Number of pages14
ISSN0022-5096
DOIs
Publication statusPublished - 2021

Keywords

  • 3D isotropic material
  • Buckling strength
  • Shape parameterization
  • Stiffness
  • Topology optimization

Fingerprint Dive into the research topics of '3D architected isotropic materials with tunable stiffness and buckling strength'. Together they form a unique fingerprint.

Cite this