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Sökning: WFRF:(Åslund Pär 1984 )

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1.
  • Hägglund, Rickard, et al. (författare)
  • Measuring thickness changes of edge-wise compression loaded corrugated board panels using digital image correlation
  • 2012
  • Ingår i: Journal of Sandwich Structures and Materials. - : SAGE Publications. - 1099-6362 .- 1530-7972. ; 14:1, s. 75-94
  • Tidskriftsartikel (refereegranskat)abstract
    • This study examines thickness changes in web-core sandwich panels under edgewise compressive loading. Both undamaged and damaged panels were examined. Three-dimensional full-field digital image correlation systems were used to determine deflections on both sides of loaded panels. The change in thickness at any given point in the panel was obtained as the difference between the two displacement fields. It was observed that the thickness was reduced in the post-buckling regime. Damage introduced into the corrugated core by lateral compression proved to significantly reduce the load-carrying capability panels and elevate the thickness reduction of the panels.
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2.
  • Åslund, Pär, 1984-, et al. (författare)
  • A note on the nonlinear mechanical behavior of planar random network structures subjected to in-plane compression
  • 2011
  • Ingår i: Journal of composite materials. - : SAGE Publications. - 0021-9983 .- 1530-793X. ; 45:25, s. 2697-2703
  • Tidskriftsartikel (refereegranskat)abstract
    • 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.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
Författare/redaktör
Åslund, Pär, 1984- (2)
Isaksson, Per (1)
Hägglund, Rickard (1)
Carlsson, Leif A. (1)
Isaksson, Per, 1968- (1)
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Mittuniversitetet (2)
Språk
Engelska (2)
Forskningsämne (UKÄ/SCB)
Teknik (2)

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