MARCO COLATOSTI

Dottore di ricerca

ciclo: XXXVI


supervisore: Prof.ssa Patrizia Trovalusci

Titolo della tesi: Numerical modelling and mechanical characterisation of composite materials as micropolar continua

The present work focuses on numerical modelling and mechanical characterisation of composite materials. The mechanical response of composites is strongly influenced by the presence of heterogeneities and discontinuities in the internal microstructure. For this reason, the numerical modelling of composites, including ceramic and metal composites, polycrystals, as well as classical materials like masonry structures and granular materials, is a non-trivial task. A possible approach is to use a micromechanical description of these materials, which provides an accurate evaluation of the material mechanical response. However, the drawback is the high computational costs resulting from the numerous degrees of freedom of the model. Therefore, a possible solution is to assume the material as a continuum. Multiscale techniques are used to provide a reliable macroscale modelling of materials, taking into account the influence of their internal features. This latter approach proves to be computationally convenient. To properly account for scale effect, various nonclassical/ non-local formulations have been proposed in the literature. Among these, micropolar theory has been proved to be very effective in representing mechanical behaviour of anisotropic media, accounting for the particles arrangements as well as their size and orientation. The objective of the work is the modelling of composite materials made of rigid blocks and thin interfaces, characterised by different textures and block sizes, as micropolar continua. Discrete models implemented in a finite element commercial code are assumed as the benchmark of the problem. The constitutive parameters of the equivalent continuous models are identified through a homogenisation procedure. This technique is based on a energy equivalence criterion between the discrete micromechanical model of the material and the continuum model. In particular, modal analysis of composites is investigated in order to explore the advantages of the micropolar description compared to both the couple-stress and classical descriptions. Moreover, the homogenisation procedure is validated by exploiting a heuristic optimisation approach. Specifically, the Differential Evolution algorithm is utilised for the micropolar constitutive parameters identification. Two different numerical procedures are tested and validated in order to pave the way for potential experimental validation. The same approach is also applied in the nonlinear field for the micropolar yield criteria parameters identification.

Produzione scientifica

11573/1718211 - 2024 - On the mechanical description of composite materials as micropolar continua
Colatosti, M.; Trovalusci, P.; Fantuzzi, N.; Carboni, Biagio - 04d Abstract in atti di convegno
congresso: 27th International Conference on Composite Structures (Ravenna, Italia)
libro: 27th International Conference on Composite Structures - ()

11573/1718210 - 2024 - Mechanical characterization of composite materials as micropolar continua
Colatosti, M.; Trovalusci, P.; Fantuzzi, N.; Forest, S. - 04d Abstract in atti di convegno
congresso: 3rd International Conference on Nonlinear Solid Mechanics (ICoNSoM 2024) (Cagliari, Italia)
libro: 3rd International Conference on Nonlinear Solid Mechanics (ICoNSoM 2024) - ()

11573/1718212 - 2024 - Numerical modelling of composite materials as micropolar continua
Colatosti, Marco; Trovalusci, Patrizia; Forest, Samuel; Carboni, Biagio - 04d Abstract in atti di convegno
congresso: XXVI Congresso AIMETA (Napoli)
libro: XXVI Congresso AIMETA - ()

11573/1682663 - 2023 - Composite material identification as micropolar continua via an optimization approach
Colatosti, M.; Carboni, B.; Fantuzzi, N.; Trovalusci, P. - 01a Articolo in rivista
rivista: COMPOSITES. PART C, OPEN ACCESS (Amsterdam: Elsevier B.V.) pp. 100362- - issn: 2666-6820 - wos: WOS:001012649500001 (1) - scopus: 2-s2.0-85160566951 (1)

11573/1691306 - 2023 - Discrete and continuum description of polycrystal materials with different symmetry class
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia - 04d Abstract in atti di convegno
congresso: CMDS14 - 14th continuum models and discrete models conference (Parigi)
libro: CMDS14 - 14th continuum models and discrete models conference - ()

11573/1691307 - 2023 - On the mechanical behaviour of microstructured materials with different symmetry class modelled as discrete and continuous systems
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia - 04d Abstract in atti di convegno
congresso: MS - Bridging the Gap between Atomistic Modeling and Continuum Mechanics - Nanoinnovation 2023 (Roma)
libro: MS - Bridging the gap between atomistic modeling and continuum mechanics - ()

11573/1617314 - 2023 - Mechanical characterization of composite materials with rectangular microstructure and voids
Colatosti, Marco; Shi, Farui; Fantuzzi, Nicholas; Trovalusci, Patrizia - 01a Articolo in rivista
rivista: ARCHIVE OF APPLIED MECHANICS (Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229) pp. - - issn: 0939-1533 - wos: WOS:000794118900001 (8) - scopus: 2-s2.0-85129832704 (7)

11573/1691310 - 2023 - Modelling of polycrystal materials with different symmetry class as discrete and continuum systems
Colatosti, Marco; Trovalusci, Patrizia; Fantuzzi, Nicholas; Luciano, Raimondo - 04d Abstract in atti di convegno
congresso: 3rd International Conference on Computations for Science and Engineering (ICCSE3) (Napoli)
libro: 3rd International Conference on Computations for Science and Engineering (ICCSE3) - ()

11573/1666555 - 2022 - Numerical modelling of masonry structures as micropolar continua
Colatosti, Marco; Carboni, Biagio; Fantuzzi, Nicholas; Trovalusci, Patrizia - 04d Abstract in atti di convegno
congresso: XXV Convegno AIMETA (Palermo)
libro: XXV Convegno AIMETA Book of Abstract - ()

11573/1666552 - 2022 - Composites with different material symmetries. Discrete-micropolar continuum description
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia - 04d Abstract in atti di convegno
congresso: ICCSE2 - 2nd International Conference on Computations for Science and Engineering (Rimini Riviera, Italy)
libro: ICCSE2 - 2nd international conference on computations for science and engineering - book of abstract - ()

11573/1666554 - 2022 - Polycrystal materials of different simmetry class. Scale dependent discrete-continuum description
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia - 04d Abstract in atti di convegno
congresso: XXV Convegno AIMETA (Palermo)
libro: XXV Convegno AIMETA Book of Abstract - ()

11573/1545189 - 2022 - New insights on homogenization for hexagonal-shaped composites as Cosserat continua
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia; Masiani, Renato - 01a Articolo in rivista
rivista: MECCANICA (Berlin, New York: Springer London ; Dordrecht ; Boston : Kluwer Academic Publishers Milano : Tamburini Milano : AIMETA) pp. - - issn: 0025-6455 - wos: WOS:000645885500001 (13) - scopus: 2-s2.0-85105395825 (9)

11573/1666528 - 2022 - Dynamic Characterization of Hexagonal Microstructured Materials with Voids from Discrete and Continuum Models
Colatosti, Marco; Shi, Farui; Fantuzzi, Nicholas; Trovalusci, Patrizia - 01a Articolo in rivista
rivista: MATERIALS (Basel: Molecular Diversity Preservation International-MDPI) pp. 7524- - issn: 1996-1944 - wos: WOS:000882236700001 (1) - scopus: 2-s2.0-85141887482 (2)

11573/1682659 - 2022 - Multiscale homogenization and analysis of anisotropic assemblies as cosserat continua
Fantuzzi, Nicholas; Shi, Farui; Colatosti, Marco; Luciano, Raimondo - 01a Articolo in rivista
rivista: INTERNATIONAL JOURNAL FOR MULTISCALE COMPUTATIONAL ENGINEERING (New York, NY; Moscow: Begell House International Association of Educational Civil Engineering Institutions.) pp. 87-103 - issn: 1543-1649 - wos: WOS:000858867700003 (6) - scopus: 2-s2.0-85136252378 (7)

11573/1689801 - 2022 - Dynamic analysis of cosserat media for anisotropic homogenized materials
Fantuzzi, Nicholas; Trovalusci, Patrizia; Colatosti, Marco - 04d Abstract in atti di convegno
congresso: SIPS22 - Sustainability through science and technology (Thailandia)
libro: SIPS 2022 PUBLICATIONS - ()

11573/1619431 - 2021 - Masonry identification as Cosserat continua via an optimization approach
Colatosti, Marco; Carboni, Biagio; Fantuzzi, Nicholas; Trovalusci, Patrizia - 04b Atto di convegno in volume
congresso: MURICO 7 – CONFERENCE (Bologna; Italia)
libro: Volume proceedings - ()

11573/1560973 - 2021 - Dynamic characterization of microstructured materials made of hexagonal-shape particles with elastic interfaces
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia - 01a Articolo in rivista
rivista: NANOMATERIALS (Basel : MDPI) pp. - - issn: 2079-4991 - wos: WOS:000676292100001 (9) - scopus: 2-s2.0-85109145706 (9)

11573/1593237 - 2021 - Time-History Analysis of Composite Materials with Rectangular Microstructure under Shear Actions
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia - 01a Articolo in rivista
rivista: MATERIALS (Basel: Molecular Diversity Preservation International-MDPI) pp. 6439- - issn: 1996-1944 - wos: WOS:000719534700001 (4) - scopus: 2-s2.0-85118590489 (4)

11573/1615759 - 2021 - Dynamics for anisotropic homogenized materials
Colatosti, Marco; Fantuzzi, Nicholas; Trovalusci, Patrizia - 04d Abstract in atti di convegno
congresso: Mechcomp7 - 7th international conference on mechanics of composites (Porto; Portogallo)
libro: MECHCOMP7 7th International Conference on Mechanics of Composites Faculty of Engineering, University of Porto, Portugal 1-3 September 2021 Book of Abstracts - ()

11573/1478997 - 2021 - Computational dynamics for anisotropic homogenized materials
Fantuzzi, N.; Lofrano, E.; Trovalusci, P.; Colatosti, M. - 04d Abstract in atti di convegno
congresso: 14th World Congress in Computational Mechanics (WCCM) - ECCOMAS Congress 2020 (Paris (France))
libro: 14th World Congress in Computational Mechanics (WCCM) - ECCOMAS Congress 2020 - Book of Abstract - ()

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