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CIMNE Seminar - "Research lines at Computational Material Design Group of CIMNE", by Xavier Oliver

Published: 02/08/2019

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Wednesday, March 13th, 2019. Time: 12 noon

Place: O.C. Zienkiewicz Conference Room, C1 Building, UPC Campus Nord, Barcelona

ABSTRACT

Computational Material Design (CMD) is a, relatively recent, field of Computational Mechanics that is experiencing an awesome development. This is, essentially, motivated by two reasons:

1) The appearance, in Material Science, of the emerging field of Metamaterials. Metamaterials are materials with awesome properties, not found in nature, which can be engineered in terms of their topology, or morphology, at low material scales.

2) The, nowadays envisaged, possibility of industrial manufacturing of those metamaterials, by means of new fabrication methods and technologies, like additive manufacturing. This opens the door to practical applications of those “materials by design”, taking them to the “industrial application interest level”, beyond their scientific or academical interest.

The lecture deals on the ongoing work and research lines of the CMD group at CIMNE, in the following fields:

  • Acoustic metamaterials design (exhibiting macroscopic negative density) and their design for application to acoustic insulation purposes, by resorting to the Local Resonant Acoustic phenomena at the mesoscale.
  • Mechanical metamaterials design (exhibiting macroscopic negative elastic stiffness), to be applied to mechanical shock absorption, by exciting mesoscopic micro-buckling at low scales, and the multi-stability and “trapped energy” phenomena.
  • New topological design computational techniques (like the Variational Closed Form Method for topological design) to increase the efficiency and robustness of computational topological optimization tools to be applied to CMD.
  • Reduced FE2 methods (RFE2 methods) to make feasible the “dream” of applying “true” hierarchical multiscale methods (FE2) to the analysis and design of structures, faithfully accounting for their multi-scale morphology.

An overall common computational framework, where CMD problems can be approached, will be sketched, and illustrated by displaying specific CMD problems and their solution technique.

SPEAKER CV

Doctor in Civil Engineering, Canals and Ports. Professor at the Polytechnic University of Catalonia. School of Civil Engineers, Canals and Ports of Barcelona. Area of knowledge: Mechanics of Continuous Media and Theory of Structures Doctorate at the U.P.C. 1982; Professor at the UPC since 1979; Research areas: Continuous Media Mechanics. Solid Nonlinear Mechanics Theory of Constituent Equations. Damage and Visco-Elasto-Plasticity models for metals and concrete. Chemo-thermo-mechanical modeling of concrete in early ages. Deterioration of Materials and Structures. Mechanics of non-linear fracture. Theory of strong discontinuities. Numerical simulation of forming processes in powder metallurgy. Non-linear dynamic analysis of Dams and Structures. Structural Optimization Structural stability Numerical methods in Structural Analysis. Direction of 14 doctoral theses in the field of Numerical Methods in the Mechanics of Solids.



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