3D architected isotropic materials with tunable stiffness and buckling strength
| Autor: | Fengwen Wang, Ole Sigmund |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
FOS: Computer and information sciences
Materials science Truss 02 engineering and technology Shape parameterization 01 natural sciences Homogenization (chemistry) Stiffness 010305 fluids & plasmas Computational Engineering Finance and Science (cs.CE) 0103 physical sciences FOS: Mathematics medicine Topology optimization Shape optimization Mathematics - Numerical Analysis Composite material Computer Science - Computational Engineering Finance and Science Geometric and material buckling Mathematics - Optimization and Control Mechanical Engineering Isotropy Numerical Analysis (math.NA) 021001 nanoscience & nanotechnology Condensed Matter Physics Buckling Optimization and Control (math.OC) Mechanics of Materials 3D isotropic material medicine.symptom 0210 nano-technology Buckling strength |
| Zdroj: | Wang, F & Sigmund, O 2021, ' 3D architected isotropic materials with tunable stiffness and buckling strength ', Journal of the Mechanics and Physics of Solids, vol. 152, 104415 . https://doi.org/10.1016/j.jmps.2021.104415 |
| ISSN: | 0022-5096 |
| DOI: | 10.1016/j.jmps.2021.104415 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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