TY - JOUR

T1 - A finite deformation gradient-enhanced damage model for nanoparticle/polymer nanocomposites

T2 - An atomistically-informed multiscale approach

AU - Arash, Behrouz

AU - Unger, Robin

AU - Exner, Wibke

AU - Rolfes, Raimund

N1 - Funding Information: The authors acknowledge the support of the LUIS scientific computing cluster, which is funded by Leibniz Universität Hannover, the Lower Saxony Ministry of Science and Culture (MWK) and the German Research Council (DFG). Funding Information: This work originates from two research projects: (1) ?Hybrid laminates and nanoparticle-reinforced materials for improved rotor blade structures? (?LENAH - Lebensdauererh?hung und Leichtbauoptimierung durch nanomodifizierte und hybride Werkstoffsysteme im Rotorblatt?), funded by the Federal Ministry of Education and Research of Germany, and (2) ?Challenges of industrial application of nanomodified and hybrid material systems in lightweight rotor blade construction? (?HANNAH ? Herausforderungen der industriellen Anwendung von nanomodifizierten und hybriden Werkstoffsystemen im Rotorblattleichtbau?), funded by the Federal Ministry for Economic Affairs and Energy. The authors wish to express their gratitude for the financial support. The authors acknowledge the support of the LUIS scientific computing cluster, which is funded by Leibniz Universit?t Hannover, the Lower Saxony Ministry of Science and Culture (MWK) and the German Research Council (DFG). Funding Information: This work originates from two research projects: (1) “Hybrid laminates and nanoparticle-reinforced materials for improved rotor blade structures” (“LENAH - Lebensdauererhühung und Leichtbauoptimierung durch nanomodifizierte und hybride Werkstoffsysteme im Rotorblatt”), funded by the Federal Ministry of Education and Research of Germany, and (2) “Challenges of industrial application of nanomodified and hybrid material systems in lightweight rotor blade construction” (“HANNAH – Herausforderungen der industriellen Anwendung von nanomodifizierten und hybriden Werkstoffsystemen im Rotorblattleichtbau”), funded by the Federal Ministry for Economic Affairs and Energy. The authors wish to express their gratitude for the financial support.

PY - 2021/2/15

Y1 - 2021/2/15

N2 - To analyze the experimentally observed failure process in nanoparticle/polymer nanocomposites, a variety of factors, including nonlocal characteristics of damage mechanism and nonlinear viscoelasticity, are required to be investigated. This work presents the development and numerical implementation of a finite deformation gradient-enhanced damage model for boehmite nanoparticle (BNP)/epoxy nanocomposites. The parameters identification of the nonlocal constitutive description is realized using a framework based on molecular simulations and experimental tests. In this context, molecular simulations are performed to parameterize the Argon model of viscoelasticity, while damage and nonlocal parameters are determined using experimental data obtained from compact-tension tests. The nonlocal constitutive model integrated into a nonlinear FE analysis is validated by comparing the numerical results of compact-tension tests of BNP/epoxy samples with experimental data. The experimental–numerical validation confirms the predictive capability of the modeling framework. The proposed procedure can be extended to other types of nanoparticle reinforced thermosetting polymers.

AB - To analyze the experimentally observed failure process in nanoparticle/polymer nanocomposites, a variety of factors, including nonlocal characteristics of damage mechanism and nonlinear viscoelasticity, are required to be investigated. This work presents the development and numerical implementation of a finite deformation gradient-enhanced damage model for boehmite nanoparticle (BNP)/epoxy nanocomposites. The parameters identification of the nonlocal constitutive description is realized using a framework based on molecular simulations and experimental tests. In this context, molecular simulations are performed to parameterize the Argon model of viscoelasticity, while damage and nonlocal parameters are determined using experimental data obtained from compact-tension tests. The nonlocal constitutive model integrated into a nonlinear FE analysis is validated by comparing the numerical results of compact-tension tests of BNP/epoxy samples with experimental data. The experimental–numerical validation confirms the predictive capability of the modeling framework. The proposed procedure can be extended to other types of nanoparticle reinforced thermosetting polymers.

KW - Boehmite nanoparticle

KW - Finite element analysis

KW - Molecular dynamics simulation

KW - Nonlocal damage model

KW - Polymer nanocomposite

UR - http://www.scopus.com/inward/record.url?scp=85095986413&partnerID=8YFLogxK

U2 - 10.1016/j.compstruct.2020.113211

DO - 10.1016/j.compstruct.2020.113211

M3 - Article

AN - SCOPUS:85095986413

VL - 258

JO - Composite structures

JF - Composite structures

SN - 0263-8223

M1 - 113211

ER -