Details
| Original language | English |
|---|---|
| Article number | 113821 |
| Journal | Computer Methods in Applied Mechanics and Engineering |
| Volume | 381 |
| Early online date | 15 Apr 2021 |
| Publication status | Published - 1 Aug 2021 |
Abstract
The prediction of failure processes in polymer nanocomposites requires accurately capturing different factors such as damage mechanisms, and temperature- and rate-dependent material characteristics. This work presents the development of a finite deformation phase-field fracture model to analyze the thermo-viscoelastic behavior of boehmite nanoparticle/epoxy nanocomposites. To characterize the rate-dependent fracture evolution, the free energy is additively decomposed into an equilibrium, a non-equilibrium, and a volumetric part with a varying definition under tensile and compressive deformation. Furthermore, the Guth–Gold and modified Kitagawa models are adopted to consider the effect of the nanoparticle contents and temperature on the nanocomposites’ fracture behavior. The applicability of the proposed model is evaluated by comparing the numerical results of compact-tension tests with experimental data. The experimental–numerical validation justifies the predictive capability of the model. Numerical simulations are also performed to study the effect of temperature and deformation rate on the force–displacement response of boehmite nanoparticle/epoxy samples in the compact-tension tests.
Keywords
- Finite deformation, Finite element, Phase-field model, Polymer nanocomposite, Viscoelasticity
ASJC Scopus subject areas
- Engineering(all)
- Computational Mechanics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Physics and Astronomy(all)
- General Physics and Astronomy
- Computer Science(all)
- Computer Science Applications
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In: Computer Methods in Applied Mechanics and Engineering, Vol. 381, 113821, 01.08.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A finite deformation phase-field fracture model for the thermo-viscoelastic analysis of polymer nanocomposites
AU - Arash, Behrouz
AU - Exner, Wibke
AU - Rolfes, Raimund
N1 - Funding Information: This work originates from two research projects: (1) “Hybrid laminates and nanoparticle-reinforced materials for improved rotor blade structures” (“LENAH - Lebensdauererhöhung 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, Germany . The authors wish to express their gratitude for the financial support. Funding Information: The authors acknowledge the support of the LUIS scientific computing cluster, Germany , which is funded by Leibniz Universität Hannover, Germany , the Lower Saxony Ministry of Science and Culture (MWK), Germany and the German Research Council (DFG).
PY - 2021/8/1
Y1 - 2021/8/1
N2 - The prediction of failure processes in polymer nanocomposites requires accurately capturing different factors such as damage mechanisms, and temperature- and rate-dependent material characteristics. This work presents the development of a finite deformation phase-field fracture model to analyze the thermo-viscoelastic behavior of boehmite nanoparticle/epoxy nanocomposites. To characterize the rate-dependent fracture evolution, the free energy is additively decomposed into an equilibrium, a non-equilibrium, and a volumetric part with a varying definition under tensile and compressive deformation. Furthermore, the Guth–Gold and modified Kitagawa models are adopted to consider the effect of the nanoparticle contents and temperature on the nanocomposites’ fracture behavior. The applicability of the proposed model is evaluated by comparing the numerical results of compact-tension tests with experimental data. The experimental–numerical validation justifies the predictive capability of the model. Numerical simulations are also performed to study the effect of temperature and deformation rate on the force–displacement response of boehmite nanoparticle/epoxy samples in the compact-tension tests.
AB - The prediction of failure processes in polymer nanocomposites requires accurately capturing different factors such as damage mechanisms, and temperature- and rate-dependent material characteristics. This work presents the development of a finite deformation phase-field fracture model to analyze the thermo-viscoelastic behavior of boehmite nanoparticle/epoxy nanocomposites. To characterize the rate-dependent fracture evolution, the free energy is additively decomposed into an equilibrium, a non-equilibrium, and a volumetric part with a varying definition under tensile and compressive deformation. Furthermore, the Guth–Gold and modified Kitagawa models are adopted to consider the effect of the nanoparticle contents and temperature on the nanocomposites’ fracture behavior. The applicability of the proposed model is evaluated by comparing the numerical results of compact-tension tests with experimental data. The experimental–numerical validation justifies the predictive capability of the model. Numerical simulations are also performed to study the effect of temperature and deformation rate on the force–displacement response of boehmite nanoparticle/epoxy samples in the compact-tension tests.
KW - Finite deformation
KW - Finite element
KW - Phase-field model
KW - Polymer nanocomposite
KW - Viscoelasticity
UR - http://www.scopus.com/inward/record.url?scp=85104637660&partnerID=8YFLogxK
U2 - 10.1016/j.cma.2021.113821
DO - 10.1016/j.cma.2021.113821
M3 - Article
AN - SCOPUS:85104637660
VL - 381
JO - Computer Methods in Applied Mechanics and Engineering
JF - Computer Methods in Applied Mechanics and Engineering
SN - 0045-7825
M1 - 113821
ER -