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A phase-field model for strength and fracture analyses of fiber-reinforced composites
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
2019 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 174, p. 58-67Article in journal (Refereed) Published
Abstract [en]

A phase-field model for brittle fracture is proposed and evaluated for strength and fracture analyses of composites. In addition to the elastic properties, this approach makes use of only the fracture toughness and the strength of the material. The capability of the method is shown in analyses of composites at two scales. In laminates, strengths of notched laminates are estimated, including hole size effects. In a lamina, cracks developed in both transverse tension and compression are analyzed and compared to other numerical methods in the literature. The effects of a spectral and a hydrostatic-deviatoric decomposition of the strain energy density, two variants often used in phase-field formulations, are studied. It is shown that the choice of the decomposition affects the fracture development. Results are compared to experiments and simulations in the literature showing the capabilities of the phase-field approach.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 174, p. 58-67
Keywords [en]
Computational mechanics, Strength, Fracture, Finite element analysis (FEA)
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:uu:diva-368254DOI: 10.1016/j.compscitech.2018.10.031ISI: 000469407500008OAI: oai:DiVA.org:uu-368254DiVA, id: diva2:1267653
Available from: 2018-12-03 Created: 2018-12-03 Last updated: 2019-07-05Bibliographically approved
In thesis
1. On numerical analyses of woven composite laminates: Homogenization, damage and fracture
Open this publication in new window or tab >>On numerical analyses of woven composite laminates: Homogenization, damage and fracture
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
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.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2019. p. 53
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1828
National Category
Applied Mechanics Aerospace Engineering Composite Science and Engineering Textile, Rubber and Polymeric Materials
Research subject
Engineering science with specialization in Applied Mechanics
Identifiers
urn:nbn:se:uu:diva-388808 (URN)978-91-513-0699-5 (ISBN)
Public defence
2019-09-13, Siegbahnsalen, The Ȧngström Laboratory, Lägerhuddsvägen 1, Uppsala, 09:15 (English)
Opponent
Available from: 2019-08-22 Created: 2019-07-05 Last updated: 2019-09-17Bibliographically approved

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Espadas-Escalante, Juan Josévan Dijk, Nico P.Isaksson, Per

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