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A note on the nonlinear mechanical behavior of planar random network structures subjected to in-plane compression
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
2011 (English)In: Journal of composite materials, ISSN 0021-9983, E-ISSN 1530-793X, Vol. 45, no 25, p. 2697-2703Article in journal (Refereed) Published
Abstract [en]

The microstructural effect on the mechanical behavior of idealized two-dimensional random fiber networks subjected to in-plane compression is studied. A finite element model utilizing nonlinear beam elements assuming a linearly elastic material is developed. On a macroscopic level, random fiber networks often display an asymmetric material behavior when loaded in tension and compression. In mechanical models, this nonlinearity is traditionally described using continuum elastic-inelastic and/or damage models even though using a continuum approach risks overlooking microstructural effects. It is found that even though a linear elastic material model is used for the individual fibers, the network gives a nonlinear response in compression. The nonlinearity is found to be caused by buckling of individual fibers. This reversible nonlinear mechanism is limited in tensile loading and hence offers an alternative explanation to the global asymmetry of random fiber networks.

Place, publisher, year, edition, pages
2011. Vol. 45, no 25, p. 2697-2703
Keywords [en]
random fiber network; compression; mechanical behavior; nonlinearity
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:miun:diva-15741DOI: 10.1177/0021998311422749ISI: 000297519800009Scopus ID: 2-s2.0-82955222951OAI: oai:DiVA.org:miun-15741DiVA, id: diva2:480280
Available from: 2012-01-19 Created: 2012-01-19 Last updated: 2017-12-08Bibliographically approved
In thesis
1. On failure mechanisms and strength predictions in corrugated board structures
Open this publication in new window or tab >>On failure mechanisms and strength predictions in corrugated board structures
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2014
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 190
National Category
Applied Mechanics
Identifiers
urn:nbn:se:miun:diva-21909 (URN)9789187557620 (ISBN)
Public defence
2014-05-27, M108, Mittuniversitetet, Sundsvall, 10:15 (English)
Supervisors
Available from: 2014-05-12 Created: 2014-05-06 Last updated: 2018-03-23Bibliographically approved

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Åslund, PärIsaksson, Per

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