Multi-scale Optimization for Additive Manufacturing of fatigue resistant shock-absorbing MetaMaterials
Sprache der Bezeichnung:
The emergence of metamaterials has opened a new paradigm in designing engineering parts in which the design of full structural
parts can be optimised together with the metamaterial they are locally composed of. Moreover, additional morphing at local and
global scales may support their adaptation to variable loading conditions and shifted user needs. As polymeric materials can fulfill
simultaneously structural mechanical and functional requirements, the combination of this design paradigm with additive
manufacturing can support/generate novel applications. However, many challenges are left in order for this change of paradigm to
become a reality:
? To improve metamaterial design and fabrication technique to produce damage tolerant metamaterials
? Robust and efficient concurrent multiscale techniques should be developed as part of a multiscale optimization problem.
? Because micro-structure and material properties suffer from uncertainties affecting structural responses, techniques for uncertainty
quantification should be developed for this multiscale design problem.
These challenges can only be addressed by considering experimental and numerical multi-scale methods. However, current existing
approaches are limited in several aspects because on the one hand of the difficulty in representing the micro-structure and
characterizing micro-scale constituent materials, and on the other hand in the computational cost inherent to these approaches.
The overall objective of this project is to develop a data-driven methodology relying on a structural properties-micro-structure
linkage and able to design optimized shock-absorption devices based on bi-stable metamaterials and printable using additive
manufacturing. Targeted applications are user-optimized shock absorber devices which either potentially suffer from fatigue such as
in the case of sport shoe soles or which should dissipate the maximum energy during their failure such as in the bicycle helmets.