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SANDFECH SIGNED

Micromechanics-based finite element modeling of sandwich structures

Total Cost €

EC-Contrib. €

Partnership

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Outcomes and
results

SANDFECH project word cloud

Explore the words cloud of the SANDFECH project. It provides you a very rough idea of what is the project "SANDFECH" about.

aalto periodic idea turku meyer engineering equivalent designs bridge easily small return finite efficient space decks sandwich residential interdisciplinary marine homogenized laser beam plate software joints welded sweden shipbuilders motivated later flexible formulated micromechanical discrete disseminated central sense savings ship models global form structural continuum readily model accounting modeled finland micromechanics group plates shipyard workshops theoretical modeling buildings unidirectional micropolar material cores substitute accounts offers beams shipbuilding fuel energetically prof university energy contrary economical simplified stiffened panels lattices replaced host instead limits steel first structures texas averaged theories subsequently chalmers conventional reddy core straightforward linear computational

Project "SANDFECH" data sheet

The following table provides information about the project.

Coordinator	AALTO KORKEAKOULUSAATIO SR Organization address address: OTAKAARI 1 city: ESPOO postcode: 2150 website: http://www.aalto.fi/en/ contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.
Coordinator Country	Finland [FI]
Project website	https://www.researchgate.net/project/SANDFECH-Micromechanics-based-finite-element-modeling-of-sandwich-structures
Total cost	249˙793 €
EC max contribution	249˙793 € (100%)
Programme	1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
Code Call	H2020-MSCA-IF-2016
Funding Scheme	MSCA-IF-GF
Starting year	2017
Duration (year-month-day)	from 2017-08-23 to 2020-08-22

Partnership

Take a look of project's partnership.

#	participants	country	role	EC contrib. [€]
1	AALTO KORKEAKOULUSAATIO SR AALTO KORKEAKOULUSAATIO SR Organization address address: OTAKAARI 1 city: ESPOO postcode: 2150 website: http://www.aalto.fi/en/ contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	FI (ESPOO)	coordinator	249˙793.00
2	Texas A&M University Texas A&M University Organization address address: Agronomy Road 750 city: College Station postcode: 77843-1260 website: n.a. contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	US (College Station)	partner	0.00

Map

Project objective

The use of novel steel sandwich panels in ship decks instead of conventional stiffened plates offers more economical and energy-efficient designs through material, space and fuel savings. To analyse the global structural response of a large ship within computational limits, the sandwich panels need to be modeled in an averaged (homogenized) sense without accounting for every small detail. Motivated by this, my objective is to develop simplified theoretical and computational micromechanics-based beam and plate models for sandwich panels that have unidirectional structural cores and flexible joints. The key theoretical modeling idea is to consider periodic panels as discrete lattices which are replaced by energetically equivalent, linear micropolar continuum beam and plate models. Subsequently, finite element models for the substitute-continuum beams and plates are formulated. Contrary to existing methods, the proposed approach includes all the necessary features. First, it fully accounts for flexible (e.g. laser-welded) joints of the panels. Second, the determination of all model parameters is straightforward. Third, the derived models can be easily implemented later in various readily available finite element software.

In addition to shipbuilding, structural core sandwich panels have applications in bridge engineering and residential buildings. The micromechanical aspect of this project is expected to provide new understanding of interdisciplinary issues in higher-order continuum theories. Such theories form a central topic in my host’s, Prof. J.N. Reddy’s research group at Texas A&M University in addition to beam and plate theories and finite elements. The results of this project are disseminated in workshops to shipbuilders at Meyer Turku shipyard (Finland) and to bridge researchers at Chalmers University of Technology (Sweden) during the return phase in the Advanced Marine Structures research group at Aalto University, Finland.

Publications

List of publications.
year	authors and title	journal	last update
2019	Anssi T. Karttunen, J.N. Reddy, Jani Romanoff Two-scale constitutive modeling of a lattice core sandwich beam published pages: 66-75, ISSN: 1359-8368, DOI: 10.1016/j.compositesb.2018.09.098	Composites Part B: Engineering 160	2019-10-15
2018	Anssi T. Karttunen, J.N. Reddy, Jani Romanoff Micropolar modeling approach for periodic sandwich beams published pages: 656-664, ISSN: 0263-8223, DOI: 10.1016/j.compstruct.2017.11.064	Composite Structures 185	2019-10-15
2019	Bruno Reinaldo Goncalves, Anssi T. Karttunen, Jani Romanoff A nonlinear couple stress model for periodic sandwich beams published pages: 586-597, ISSN: 0263-8223, DOI: 10.1016/j.compstruct.2019.01.034	Composite Structures 212	2019-10-15
2019	Praneeth Nampally, Anssi T. Karttunen, J.N. Reddy Nonlinear finite element analysis of lattice core sandwich beams published pages: 431-439, ISSN: 0997-7538, DOI: 10.1016/j.euromechsol.2018.12.006	European Journal of Mechanics - A/Solids 74	2019-10-15
2019	Anssi T. Karttunen, J.N. Reddy, Jani Romanoff Two-scale micropolar plate model for web-core sandwich panels published pages: 82-94, ISSN: 0020-7683, DOI: 10.1016/j.ijsolstr.2019.04.026	International Journal of Solids and Structures 170	2019-10-15

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