Phase-field modeling of fracture in viscoelastic–viscoplastic thermoset nanocomposites under cyclic and monolithic loading

verfasst von: Behrouz Arash, Shadab Zakavati, Betim Bahtiri, Maximilian Jux, Raimund Rolfes
Abstract: In this study, a finite deformation phase-field formulation is developed to investigate the effect of hygrothermal conditions on the viscoelastic–viscoplastic fracture behavior of epoxy nanocomposites under cyclic and monolithic loading. The formulation incorporates a definition of the Helmholtz free energy, which considers the effect of nanoparticles, moisture content, and temperature. The free energy is additively decomposed into a deviatoric equilibrium, a deviatoric non-equilibrium, and a volumetric contribution. The proposed derivation offers a realistic modeling of damage and viscoplasticity mechanisms in the nanocomposites by coupling the phase-field damage model and a viscoelastic–viscoplastic model. Numerical simulations are conducted to study the cyclic force–displacement response of both dry and saturated boehmite nanoparticle (BNP)/epoxy samples, considering BNP contents and temperature. Comparing numerical results with experimental data shows good agreement at various BNP contents. In addition, the predictive capability of the phase-field model is evaluated through simulations of notched nanocomposite plates subjected to monolithic tensile and shear loading.
Organisationseinheit(en): Institut für Statik und Dynamik
Externe Organisation(en): Oslo University College
Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Typ: Artikel
Journal: Engineering with computers
Band: 41
Seiten: 681-701
Anzahl der Seiten: 21
ISSN: 0177-0667
Publikationsdatum: 02.2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Software, Modellierung und Simulation, Allgemeiner Maschinenbau, Angewandte Informatik
Elektronische Version(en): https://doi.org/10.1007/s00366-024-02041-8 (Zugang: Offen)

BibTeX

@article{6e79d17002a54342aac4f4f6cdeb8a87,
title = "Phase-field modeling of fracture in viscoelastic–viscoplastic thermoset nanocomposites under cyclic and monolithic loading",
abstract = "In this study, a finite deformation phase-field formulation is developed to investigate the effect of hygrothermal conditions on the viscoelastic–viscoplastic fracture behavior of epoxy nanocomposites under cyclic and monolithic loading. The formulation incorporates a definition of the Helmholtz free energy, which considers the effect of nanoparticles, moisture content, and temperature. The free energy is additively decomposed into a deviatoric equilibrium, a deviatoric non-equilibrium, and a volumetric contribution. The proposed derivation offers a realistic modeling of damage and viscoplasticity mechanisms in the nanocomposites by coupling the phase-field damage model and a viscoelastic–viscoplastic model. Numerical simulations are conducted to study the cyclic force–displacement response of both dry and saturated boehmite nanoparticle (BNP)/epoxy samples, considering BNP contents and temperature. Comparing numerical results with experimental data shows good agreement at various BNP contents. In addition, the predictive capability of the phase-field model is evaluated through simulations of notched nanocomposite plates subjected to monolithic tensile and shear loading.",
keywords = "Finite deformation, Phase-field modeling, Polymer nanocomposites, Viscoplasticity",
author = "Behrouz Arash and Shadab Zakavati and Betim Bahtiri and Maximilian Jux and Raimund Rolfes",
note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",
year = "2025",
month = feb,
doi = "10.1007/s00366-024-02041-8",
language = "English",
volume = "41",
pages = "681--701",
journal = "Engineering with computers",
issn = "0177-0667",
publisher = "Springer London",
number = "1",
}