Publication: Lifespan prediction of glass fiber reinforced polymers subjected to flexural creep and elevated temperatures using analytical and numerical analyses
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Date
2024
Authors
Alhayek A.
Syamsir A.
Supian A.B.M.
Usman F.
Journal Title
Journal ISSN
Volume Title
Publisher
John Wiley and Sons Inc
Abstract
This paper presents the experimental, analytical, and numerical extensive investigation into the flexural creep performance of pultruded glass fiber reinforced polymer (pGFRP) composites at elevated service temperatures. The experimental phase involved a physical testing program on pGFRP coupons in a four-point bending setup covering a wide range of loads (12%, 24%, and 37% stress levels) and temperature conditions (20, 40, and 60�C) over a long test duration of 720 h. The analytical Burgers model was employed to provide theoretical insights into the time-dependent deformation behaviors, while the finite element analysis (FEA) simulations using derived reduction factor validated the accuracy of the proposed procedure. Burgers model was able to capture the experimental data very well and reached the ultimate strain failure limit within about 1.4?50 years depending on the case. The proposed simple FEA procedure yielded a pattern closely resembling the one observed from Burgers model in which they resulted in estimated endurance times with a roughly 15% difference between them. Highlights: The higher stress and/or temperature, the longer the primary creep stage is. Burgers model is able to capture the experimental data very well in all conditions. Burgers general equation is able to predict failure within about 1.4?50 years. A proposed reduction factor based on Burgers model is utilized in FEA The FEA procedure shows a roughly 15% difference compared to Burgers model. ? 2024 Society of Plastics Engineers.
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Keywords
Bending tests , Creep testing , Elastomers , Glass fiber reinforced plastics , Plastic products , Burger model , Finite element analyse , Finite element analyze , Glassfiber reinforced polymers (GFRP) , Lifespans , Matrix composite , Polymer matrices , Polymer-matrix composite , Reduction factor , Stress temperature , Glass fibers