Effect of transverse strains and angular distortions on the nanoscale elastic behavior of platelet nanocomposites

Fernández Zapico, Guillermo and Muñoz Guijosa, Juan Manuel and Río López, Benito del and Akasaka, H. (2018). Effect of transverse strains and angular distortions on the nanoscale elastic behavior of platelet nanocomposites. "Composites Part B: Engineering", v. 154 ; pp. 10-19. ISSN 1359-8368. https://doi.org/10.1016/j.compositesb.2018.07.045.

Description

Title: Effect of transverse strains and angular distortions on the nanoscale elastic behavior of platelet nanocomposites
Author/s:
  • Fernández Zapico, Guillermo
  • Muñoz Guijosa, Juan Manuel
  • Río López, Benito del
  • Akasaka, H.
Item Type: Article
Título de Revista/Publicación: Composites Part B: Engineering
Date: 1 December 2018
ISSN: 1359-8368
Volume: 154
Subjects:
Freetext Keywords: Computational modelling; Polymer-matrix composites (PMCs); Debonding
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Mecánica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In order to correctly predict the macroscale elastic behavior of nanocomposite macroscale structures, an accurate nanoscale model must be available for subsequent homogenization. In this work, we demonstrate that the accuracy of that nanoscale model greatly depends on the consideration of transverse strains and angular distortions, which are not frequently taken into account, but have a significant influence on the cohesive mechanisms at the nanofiller-matrix interface. We use a nanoscale cohesive model to qualitatively and quantitatively analyze the effect of transverse shear and angular distortion on the interfacial stress transfer mechanisms. While the effect of the transverse strain is less significant, results show that angular distortion greatly affects the interfacial damage pattern. It appears to shift the interfacial shear stress distribution to one of the interface ends, which consequently also modifies the interfacial longitudinal stress distribution and its mean value, resulting in reduced nanocomposite stiffnesses. The effect should be taken into account as shear and transverse strains may be present at the macroscale if, for instance, nanofiller misalignment or stress concentrators exist. We also provide design maps representing damage onset for different 2D multiaxial strain states in graphene-epoxy nanocomposites, so that the strain state limit can be inferred for the given nanocomposite properties. A substantial reduction in the allowable strains can be observed.

More information

Item ID: 52377
DC Identifier: http://oa.upm.es/52377/
OAI Identifier: oai:oa.upm.es:52377
DOI: 10.1016/j.compositesb.2018.07.045
Official URL: https://www.sciencedirect.com/science/article/pii/S1359836818311880
Deposited by: Memoria Investigacion
Deposited on: 18 Oct 2018 15:05
Last Modified: 18 Oct 2018 15:05
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