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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

Journal Article (2018)
Author(s)

X. Jiang (Tongji University)

Chengwei Luo (Tongji University)

Xuhong Qiang (Tongji University)

Qilin Zhang (Tongji University)

Henk Kolstein (TU Delft - Steel & Composite Structures)

FSK Bijlaard (TU Delft - Steel & Composite Structures)

Research Group
Steel & Composite Structures
Copyright
© 2018 X. Jiang, Chengwei Luo, X. Qiang, Qilin Zhang, M.H. Kolstein, F.S.K. Bijlaard
DOI related publication
https://doi.org/10.3390/polym10080845
More Info
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Publication Year
2018
Language
English
Copyright
© 2018 X. Jiang, Chengwei Luo, X. Qiang, Qilin Zhang, M.H. Kolstein, F.S.K. Bijlaard
Research Group
Steel & Composite Structures
Issue number
8
Volume number
10
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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.