Fracture toughness of exponential layer-by-layer polyurethane/poly(acrylic acid) nanocomposite films

Kheng, Eugene; Iyer, Harish; Podsiadlo, Paul; Kaushik, Amit; Kotov, Nicholas A.; Arruda, Ellen M.; Waas, Anthony M.

doi:10.1016/j.engfracmech.2010.08.006

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…The DCZM was developed by ideas first introduced by Song and Waas (6) and further refined by Xie and Waas (7) and Gustafson and Waas (8) . The DCZM employed here has been applied to various engineering problems and proven to be an efficient and accurate tool for predicting discontinuous surface behavior thereby facilitating the modelling of delaminations (9,10,11,12,13) . Figure 1 illustrates the initial configuration of a 3D DCZM element and its deformed configuration in the local co-ordinate system.…”

Section: Analytical Models For Progressive Failure Analysis 21 Discrmentioning

confidence: 99%

“…. Equations 10, (11), and (12) form the basis of a thermodynamically-based Schapery theory for predicting nonlinear structural changes in a material. Note that the use of these modelling strategies computes lamina degradation evolution during the damage process using the physics of the failure mechanisms.…”

Section: Prediction Of Degrading In-plane Materials Properties Throughmentioning

confidence: 99%

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Progressive failure analysis for the interaction of interlaminar and intralaminar failure modes in composite structures with an initial delamination

Waas

2013

Aeronaut. j. (1968)

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This paper is concerned with the development of a failure initiation and progressive failure analysis (PFA) method for advanced composite structures. The present PFA model is capable of predicting interactive out-of-plane and in-plane failure modes observed in fiber reinforced composite laminates including interlaminar behavior and matrix microdamage at the mesoscale. A probability analysis tool is coupled with the PFA to account for uncertainty in modelling parameters caused by material variability and manufacturing inconsistencies. The progressive damage response of a laminated composite panel with an initial delamination is studied and used to demonstrate the PFA modelling framework that is presented here.

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Section: Analytical Models For Progressive Failure Analysis 21 Discrmentioning

confidence: 99%

Section: Prediction Of Degrading In-plane Materials Properties Throughmentioning

confidence: 99%

Progressive failure analysis for the interaction of interlaminar and intralaminar failure modes in composite structures with an initial delamination

Waas

2013

Aeronaut. j. (1968)

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“…Recently, many studies have been directed at understanding the effect of an interphase region that is formed in the vicinity of nanoscale fillers [13,14,16,24]. Continuum based finite element modeling studies can be effectively used to understand the physical and mechanical interactions between the nanoparticles and the bulk polymer chains in these nanocomposites [11,12]. As a polymer, the response of bulk polyurethane depends on the applied strain rate and strain amplitude and the dependence can be highly nonlinear.…”

Section: Introductionmentioning

confidence: 99%

Rate dependent finite strain constitutive modeling of polyurethane and polyurethane–clay nanocomposites

Sain

Meaud

Yeom

et al. 2015

International Journal of Solids and Structures

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Please cite this article as: Sain, T., Meaud, J., Yeom, B., Waas, A.M., Arruda, E.M., Rate dependent finite strain constitutive modeling of polyurethane and polyurethane-clay nanocomposites, International Journal of Solids and Structures (2014), doi: http://dx.Abstract A finite strain nonlinear viscoplastic constitutive model for polyurethane (PU)-Montmorillonite clay (MTM) nanocomposites is developed with the goal of characterizing the mechanical response under different strain rates and strain amplitudes. In this model, both the elastic and viscous responses are considered to be nonlinear. It is shown that a simple mathematical extension of the model used to characterize the PU determines the nonlinear material constants for the PU-MTM. A finite deformation nonlinear viscoelastic model is used to represent the mechanical behavior of PU. The rate dependent viscous behavior and multiple relaxation times present in the PU response are determined using the frequency dependent tan δ measurements from Dynamic Mechanical Analysis (DMA). The model is capable of accurately capturing both the rate dependent behavior and frequency dependent damping of PU. The entire rate dependent hysteresis behavior (loading-unloading) is predicted accurately through the constitutive model for strains up to 10%. For the PU-MTM nanocomposite, the constitutive stress update is implemented in a finite element (ABAQUS/Explicit) framework and validated using a range of experimental results. The model predictions show excellent agreement with experimental results in capturing rate dependent loading/unloading responses for both PU and PU-MTM nanocomposites. The proposed model can easily be extended to characterize other polyurethane based nanocomposites.

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Mechanical Characterization of Iron Flakes Filled Polyurethane Composites

Singh,

Chandra,

Kitey

2024

Lecture Notes in Mechanical Engineering

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Fracture toughness of exponential layer-by-layer polyurethane/poly(acrylic acid) nanocomposite films

Cited by 7 publications

References 18 publications

Progressive failure analysis for the interaction of interlaminar and intralaminar failure modes in composite structures with an initial delamination

Progressive failure analysis for the interaction of interlaminar and intralaminar failure modes in composite structures with an initial delamination

Rate dependent finite strain constitutive modeling of polyurethane and polyurethane–clay nanocomposites

Mechanical Characterization of Iron Flakes Filled Polyurethane Composites

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