Extended mean-field homogenization of viscoelastic-viscoplastic polymer composites undergoing hybrid progressive degradation induced by interface debonding and matrix ductile damage

Autor: Fodil Meraghni, Qiang Chen, George Chatzigeorgiou
Přispěvatelé: Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)
Rok vydání: 2021
Předmět:
Probabilistic Density Function
Materials science
02 engineering and technology
[SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph]
Homogenization (chemistry)
Viscoelasticity
0203 mechanical engineering
Transformation Field Analysis
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
Phenomenological model
medicine
Evolving Damage
Mori-Tanaka Homogenization
General Materials Science
Mécanique: Mécanique des matériaux [Sciences de l'ingénieur]
Composite material
Viscoelastic-Viscoplastic Behavior
Interphase
Weibull distribution
Viscoplasticity
Applied Mathematics
Mechanical Engineering
Mécanique: Mécanique des solides [Sciences de l'ingénieur]
Stiffness
Micromechanics
021001 nanoscience & nanotechnology
Condensed Matter Physics
020303 mechanical engineering & transports
Mechanics of Materials
Modeling and Simulation
medicine.symptom
0210 nano-technology
Zdroj: International Journal of Solids and Structures
International Journal of Solids and Structures, Elsevier, 2020, 210-211, pp.1-17. ⟨10.1016/j.ijsolstr.2020.11.017⟩
ISSN: 0020-7683
DOI: 10.1016/j.ijsolstr.2020.11.017
Popis: International audience; In this contribution, a probabilistic micromechanics damage framework is presented to predict the macroscopic stress-strain response and progressive damage in unidirectional glass-reinforced thermoplastic polymer composites. Motivated by different failure modes observed experimentally, the damage mechanism in the vicinity of the fibers (namely, the interphase) is characterized by initiating and growing voids. The mechanisms can be formulated through a Weibull probabilistic density function. In contrast, the ductile progressive degradation of matrix initial stiffness is analyzed via the continuum damage theory. To accommodate different damage mechanisms in the matrix and the interphase, a three-phase Mori-Tanaka (MT) method and transformation field analysis approach (TFA) are established within a unified framework that allows simulation of both ductile and discrete damages in different phases. Moreover, the rate-dependent viscoelastic and viscoplastic response of the polymer matrix phase is modelled through a phenomenological model consisting of four Kelvin-Voigt branches and a viscoplastic branch under the thermodynamics framework. The reliability and efficiency of the modified mean-field damage model, based on TFA and Mori-Tanaka scheme, are assessed by comparing the simulated stress-strain response against full-field Abaqus simulations under both unidirectional and multiaxial nonproportional loading paths at different loading rates. The developed model provides an efficient alternative to the finite-element based full-field homogenization schemes or other mean-field micromechanics techniques that may be compared, as well as a framework for a potential extension of the theory for simulating damage evolution in composites with random reinforcement orientations.
Databáze: OpenAIRE
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