An interfacial debonding-induced damage model for graphite nanoplatelet polymer composites

作者：Safaei M; Sheidaei A; Baniassadi M^*; Ahzi S; Mashhadi M Mosavi; Pourboghrat F

来源：Computational Materials Science, 2015, 96: 191-199.

DOI：10.1016/j.commatsci.2014.08.036

• Polymer nanocomposites
• Interfacial debonding
• Cohesive zone model

In situ tensile tests show damage initiates in polymer nanocomposites mainly by interfacial debonding. In this paper a hierarchical multiscale model is developed to study the damage initiation in the graphite nanoplatelets (GNP) reinforced polymer composites. The cohesive zone model was adopted to capture the nanofillers deboning. The results of atomic simulations of GNP pullout and debonding tests were used to obtain the traction-displacement relation for the cohesive zone model (CZM). The effects of volume fraction and aspect ratio of the GNP and the strength of the interfacial adhesion on the overall stress-strain response of the nanocomposite have been investigated. Results show that debonding has a significant effect on the overall stress-strain response of the nanocomposite when volume fraction and aspect ratio increase. The results also indicate that GNP/polymer interfacial strength plays a key role in the damage mechanism of the polymer nanocomposites.

• 出版日期2015-1