ABOUT

Main topics of the Colloquium:

• Elaboration of suitable homogenization schemes to construct adequate mechanical models for geometrically complex inner architectures. Especially, generalized continuum models may be required to account for the specific microstructural deformation modes and scale effects exhibited by these materials. Relating effective properties or architected materials to their microstructural features enables to tune microstructural anisotropy (by adjusting the inner architecture) to exceed the isotropic limits of Poisson's ratio values ([-1, 0.5[), especially to achieve non-conventional mechanical behaviors like auxetics or ultra-soft or ultra-stiff in lightweight designs.
  
  
• Multiscale models and computational methods to access the static and dynamic properties of architected materials: plasticity, rupture, vibration, damping, shock and impact, acoustic properties, especially the control of bandgap width via the inner architecture.
  
  
  
• Large deformation aspects: analysis of geometric nonlinearities; elastic instabili­ties such as buckling, folding and snapping, floppy modes and mecha­nisms due to the presence of hinges. The follow up of such unstable behaviors and their consequences at the macroscopic scale requires dedicated numerical methods.
  
  
• Improved design tools of novel 3D architectures such as topology optimization methods combined with multiscale strategies to find more systematically new designs and reach ultra-stiff or ultra-soft designs, to achieve a good compromise between high mechanical performance and lightweight structures.
  
  
• Full-field measurements to relate the overall mechanical response to the local response of architected materials. They provide a detailed quantitative understanding of the microscopic deformation mechanisms responsible for the mechanical performances at the upper scales.
  
  
• Measurement methods of mechanical properties of network materials and identification of effective model parameters - especially higher order moduli .
  
  
• Effect of topological disorder on the mechanical properties of architected materials.