On the identification of the coefficient of moisture expansion of polyamide-6: Accounting differential swelling strains and plasticization

Obeid, Hassan; Clément, Alexandre; Fréour, Sylvain; Jacquemin, Frédéric; Casari, Pascal

doi:10.1016/j.mechmat.2017.12.002

Cited by 38 publications

(34 citation statements)

References 28 publications

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“…The industrial interest lies in the reduction of testing time and testing-related expenses. Thus, a modelling approach to swelling of FRPs due to the effects of water (and also other liquids, such as oil) is of interest [16].…”

Section: Introductionmentioning

confidence: 99%

“…Various studies have been performed on swelling of FRPs [10,13,[17][18][19][20][21][22][23][24][25] and, more recently, on hygroscopic swelling in textile composites [26,27]. The works available in the literature have addressed several aspects of hygroscopic swelling in composites, from the nature of swelling in polymeric matrix [3,10,28,29], to the influence of swelling on the fluid diffusion in polymers [13,16,23,30,31], to the development of micromechanical models to predict transverse swelling [17,26,27].…”

Section: Introductionmentioning

confidence: 99%

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Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

2019

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Swelling in fiber-reinforced composites is anisotropic. In this work, dealing with glass fiber epoxy composite immersed in distilled water, swelling coefficients are obtained in each direction experimentally. Swelling behaviour in the fiber direction was constrained by the non-swelling fibers and was close to null, while swelling in the transverse directions was found to occur freely—similar to the unconstrained polymer. An analytical method for predicting anisotropic swelling in composites from the swelling of the matrix polymer is reported in this work. The method has an advantage that it is simple to use in practice and requires only a swelling coefficient of the matrix polymer, elastic constants of the matrix and fibers, and a known fiber volume fraction of the composite. The method was validated using finite element analysis. Good agreement was obtained and is reported between experimental hygroscopic swelling data, analytical and numerical results for composite laminates, indicating the validity of this predictive approach.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

2019

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“…At present, the CHE is mainly used to evaluate the moisture expansion and interfacial stress performance of ceramic tiles, clay blocks, and polymer composite materials [21,22]. It is a phenomenological evaluation index based on the final results of moisture absorption.…”

Section: Introductionmentioning

confidence: 99%

The Linear Hygroscopic Expansion Coefficient of Cement-Based Materials and Its Determination

et al. 2019

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A crack caused by shrinkage could remarkably increase the permeability, heavily deteriorate the durability, and heavily deteriorate the service life of a concrete structure. However, different forms of thermal shrinkage can be predicted by directly applying a temperature load on a node. The prediction of moisture-induced stresses in cement-based materials by using the common finite element method (FEM) software is a big challenge. In this paper, we present a simple numerical calculation approach by using the proposed coefficient of hygroscopic expansion (CHE) to predict the moisture-induced deformation of concrete. The theoretical calculation formula of the linear CHE (LCHE) of cement-based material was deduced based on the Kelvin–Laplace equation and the Mackenzie equation. The hygroscopic deformation of cement mortar was investigated by inversion analysis; based on the results, the LCHE could be determined. Moreover, a case analysis of the application of LCHE to concrete is also conducted. The simulated results of concrete shrinkage were close to the experimental ones. As a whole, it is feasible to predict the drying shrinkage of concrete through simple calculation by using the proposed LCHE, which is also beneficial to the direct application of moisture loads on nodes in finite element analysis (FEA).

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“…D'un point de vue numé rique, deux approches sont pré sentes dans la litté rature pour é valuer ces contraintes. Premiè rement, la mé thode dé couplé e tient uniquement compte de l'impact de l'absorption d'eau sur le gonflement et les é tats mé caniques associé s [17][18][19][20]. Cette mé thode permet de reproduire de maniè re satisfaisante l'absorption d'humidité mais elle ne tient pas compte d'éventuels phé nomè nes de plastification ou de l'effet des contraintes internes sur le processus de diffusion.…”

Section: Introductionunclassified

Biocomposites with Asymmetric Stacking for the Study of Hygro-mechanical Couplings

Péron¹,

Célino²,

Castro³

et al. 2019

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On the identification of the coefficient of moisture expansion of polyamide-6: Accounting differential swelling strains and plasticization

Cited by 38 publications

References 28 publications

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

The Linear Hygroscopic Expansion Coefficient of Cement-Based Materials and Its Determination

Biocomposites with Asymmetric Stacking for the Study of Hygro-mechanical Couplings

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