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Polymers 2018, 10(8), 845; https://doi.org/10.3390/polym10080845

Coupled Hygro-Mechanical Finite Element Method on Determination of the Interlaminar Shear Modulus of Glass Fiber-Reinforced Polymer Laminates in Bridge Decks under Hygrothermal Aging Effects

1
Department of Bridge Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
2
Department of Structural Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
3
Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628CN Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 26 June 2018 / Revised: 25 July 2018 / Accepted: 25 July 2018 / Published: 1 August 2018
(This article belongs to the Special Issue Simulations of Polymers)
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Abstract

To investigate the mechanical degradation of the shear properties of glass fiber-reinforced polymer (GFRP) laminates in bridge decks under hygrothermal aging effects, short-beam shear tests were performed following the ASTM test standard (ASTM D790-10A). Based on the coupled hygro-mechanical finite element (FE) analysis method, an inverse parameter identification approach based on short-beam shear tests was developed and then employed to determine the environment-dependent interlaminar shear modulus of GFRP laminates. Subsequently, the shear strength and modulus of dry (0% Mt/M), moisture unsaturated (30% Mt/M and 50% Mt/M), and moisture saturated (100% Mt/M) specimens at test temperatures of both 20 °C and 40 °C were compared. One cycle of the moisture absorption–desorption process was also investigated to address how the moisture-induced residual damage degrades the shear properties of GFRP laminates. The results revealed that the shear strength and modulus of moisture-saturated GFRP laminates decreased significantly, and the elevated testing temperature (40 °C) aggravated moisture-induced mechanical degradation. Moreover, an unrecoverable loss of shear properties for the GFRP laminates enduring one cycle of the moisture absorption–desorption process was evident. View Full-Text
Keywords: fiber-reinforced polymer composite; interlaminar shear modulus; hygrothermal aging effect; mechanical degradation; short-beam test; finite element method fiber-reinforced polymer composite; interlaminar shear modulus; hygrothermal aging effect; mechanical degradation; short-beam test; finite element method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Jiang, X.; Luo, C.; Qiang, X.; Zhang, Q.; Kolstein, H.; Bijlaard, F. Coupled Hygro-Mechanical Finite Element Method on Determination of the Interlaminar Shear Modulus of Glass Fiber-Reinforced Polymer Laminates in Bridge Decks under Hygrothermal Aging Effects. Polymers 2018, 10, 845.

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