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A study on the influence of boundary conditions in computational homogenization of periodic structures with application to woven composites
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik.
2017 (engelsk)Inngår i: Composite structures, ISSN 0263-8223, E-ISSN 1879-1085, Vol. 160, s. 529-537Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The influence of boundary conditions (BCs) in the estimation of elastic properties of periodic structures is investigated using computational homogenization with special focus on planar structures. Uniform displacement, uniform traction, periodic, in-plane periodic and a proposed mix of periodic and traction BCs are used. First, the effect of the BCs is demonstrated in structures with one-, two- and three-dimensional periodicity. Mixed BCs are shown to most accurately represent the behavior of layered structures with a small number of repeating unit cells. Then, BCs are imposed on a twill woven composite architecture. Special attention is devoted to investigate the sensitivity of the estimated properties with respect to the BCs and to show differences when considering a single lamina or a laminate. High sensitivity of the in-plane extensional modulus and Poisson's ratio with respect to the type of BCs is found. Moreover, it is shown that the mix of BCs and in-plane periodic BCs are capable to represent an experimental strain field.

sted, utgiver, år, opplag, sider
2017. Vol. 160, s. 529-537
Emneord [en]
Computational homogenization, Mixed boundary conditions, Heterogeneous structures, Elastic properties, Woven composites, Finite element method
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-359307DOI: 10.1016/j.compstruct.2016.10.082ISI: 000390470300044OAI: oai:DiVA.org:uu-359307DiVA, id: diva2:1244327
Tilgjengelig fra: 2018-08-31 Laget: 2018-08-31 Sist oppdatert: 2019-07-05bibliografisk kontrollert
Inngår i avhandling
1. On numerical analyses of woven composite laminates: Homogenization, damage and fracture
Åpne denne publikasjonen i ny fane eller vindu >>On numerical analyses of woven composite laminates: Homogenization, damage and fracture
2019 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This dissertation analyzes various mechanical properties of textile reinforced composite laminates.

The dissertation is based on a total of six published works, which are essentially numerical, although experimental elements are available. The numerical methods used are based on high-resolution finite element models in combination with sophisticated phase-field theories for brittle fracture. A key result is that important mechanical properties in engineering applications, such as fracture or damage resistance, can be substantially affected by the arrangement of the constituent materials at the meso level.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2019. s. 53
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1828
HSV kategori
Forskningsprogram
Teknisk fysik med inriktning mot tillämpad mekanik
Identifikatorer
urn:nbn:se:uu:diva-388808 (URN)978-91-513-0699-5 (ISBN)
Disputas
2019-09-13, Siegbahnsalen, The Ȧngström Laboratory, Lägerhuddsvägen 1, Uppsala, 09:15 (engelsk)
Opponent
Tilgjengelig fra: 2019-08-22 Laget: 2019-07-05 Sist oppdatert: 2019-09-17bibliografisk kontrollert

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