Ageing of pultruded glass fibre reinforced polymer composites exposed to combined environmental agents

Carra, Guglielmo; Carvelli, Valter

doi:10.1016/j.compstruct.2013.10.042

Cited by 81 publications

(49 citation statements)

References 23 publications

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“…An Arrhenius related methodology [11] has been used to predict the long-term behaviour of three commercially available pultruded GFRP plates adopted as cladding in have been considered as measurement of the materials ageing and, by defining a performance related threshold, it has been possible to estimate the expected service life of the three materials composition. A comparison of the mechanical performance of the composites immersed in water, with data collected through natural ageing [12] has been also proposed to compare the magnitude of the imparted degrade in water with that in a semi-continental natural environment. The natural ageing was imparted in the environment of a semi-continental city (Milan -Italy) placing the pultruded plates of the three compositions on a dark horizontal roof, 10 m above the ground, for twelve consecutive months [12].…”

Section: Introductionmentioning

confidence: 99%

Long-term bending performance and service life prediction of pultruded Glass Fibre Reinforced Polymer composites

Carra¹,

Carvelli

2015

Composite Structures

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Section: Introductionmentioning

confidence: 99%

Long-term bending performance and service life prediction of pultruded Glass Fibre Reinforced Polymer composites

Carra¹,

Carvelli

2015

Composite Structures

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“…In P. Surathi et al [13] tried to investigate the reduction of moduli and strengths according to moisture absorption measurements [13]. In G. Carra et al [14] tried to estimate the reduction of mechanical properties of pultruded glass fibre reinforced polymer composites due to their exposure in combined environmental agents [14]. In Duncan Bruce et al [15] were focused on measurement and modelling of permeation and diffusion in polymers and their effort was used to supplement experimental measurements, improving understanding and enabling extrapolation of behaviour over time scales and in large components that are not experimentally convenient [15].…”

Section: Models For Combined Diffusion and Moduli Degradation Analysimentioning

confidence: 99%

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2017

MOJPS

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The need to develop methodologies for life prediction of glass fibre reinforced polymers (GFRPs) has rapidly increased with the use of composites in many different industries. Currently, there is very little understanding of the ageing mechanisms in composites. It is important to develop a detailed through the thickness degradation analysis due to ageing, so as to predict its effect on the lifetime of composite structures. In the first part of this study an effort has been made to model the moisture absorption, the concentration of the absorbed fluid, and the reduction of mechanical properties, especially elastic moduli and strength in the through the thickness direction of a GFRP structure. The water absorption behavior of woven glass fibre reinforced cyanate ester composites used in the plenum of the air conditioning pack of aircraft's environmental control system has been modeled. The combined models describe the diffusion procedure primarily at material level and continuously at structure level. The amount of the absorbed moisture can be crucial for the mechanical behavior of the structure. Therefore, there is a need for a better understanding of the evolution of mechanical properties during ageing. The whole procedure utilizes the results of the diffusion model for the calculation of the degradation of the moduli during the water uptake process. Predictive models have been proposed, by considering different sections throughout the thickness and provide a solid background for modeling the long term behavior of a structure under consideration exposed at different temperature and different time period. Keywords: Models for Combined Diffusion and Moduli Degradation Analysis of Glass Reinforced Cyanate Ester Composites Structures 2/15Copyright: ©2017 Kostopoulos et al. there is a need for a deeper understanding of the degradation of composite properties during given operating ageing so as to predict the mechanical properties at any given time [9].Primarily, SD Speake et al. [10] had tried to create a method in order to predict the changes of mechanical properties in laminates as a consequence of prolonged immersion in water. These changes were found to be function of the absorbed moisture [10]. In S. Kajorncheappunnganet al.[11] studied the effects of the environmental ageing on the durability of glass/ epoxy composites. He was focused on the major factors that influenced the degradation of glass/epoxy composites [11]. In JR Reeder et al. [12] had developed a prediction methodology of long-term strength degradation of thermoplastic composites using time-temperature superposition [12]. In P. Surathi et al. [13] tried to investigate the reduction of moduli and strengths according to moisture absorption measurements [13]. In G. Carra et al. [14] tried to estimate the reduction of mechanical properties of pultruded glass fibre reinforced polymer composites due to their exposure in combined environmental agents [14]. In Duncan Bruce et al. [15] were focused on measurement and modelling of permeation and d...

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“…A. Glass fiber reinforced polymer (GFRP) Glass fiber, carbon fiber and their hybrid is finding a variety of applications in automobile industry [24] and building construction [25]. Glass fiber being the cheaper material is used in almost all industries where structural optimization and weight reduction could lead to energy saving and cost reduction.…”

Section: Materials Selectionmentioning

confidence: 99%

Design, Simulation and Manufacturing of an Integrated Composite Material Parabolic Trough Solar Collector

Abdel-Hady¹,

Shakil²,

Hamed³

et al. 2016

IJET

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Abstract-Design, simulation, and manufacturing process of an integrated thermal photovoltaic closed parabolic collector (ITPVCPC) using composite material is presented in this paper. The design includes two flanges for supporting photovoltaic panels. Two cases of troughs were designed and studied, one with glass cover over the aperture area and another without it in order to investigate the structure rigidity and solar ray collection in the absorber tube. Three-dimensional modelling and structural finite element analysis (FEA) based simulation was done for the design. In the simulation, the ITPVCPC structure was subjected to the upper limits of wind pressure and temperature-rise loadings similar to the real working conditions. Optical analysis was done for the trough to study the effect of structure deformation on solar ray collection. The glass covered ITPVCPC showed higher structure deformation than the one without glass. Glass fiber with polyester resin was used in the manufacture of ITPVCPC for its low price compared to other composite materials. The study shows that glass fiber (with polyester matrix) is an ideal composite material for ITPVCPC for its high rigidity, low cost, and ease of manufacture. This design is successfully implemented and is the source of thermal and electrical power for a solar desalination system installed in Jeddah, Saudi Arabia. Keywords: Finite element analysis (FEA), concentrating solar power (CSP), hand-layup method, glass fiber reinforced polymer (GFRP) I.INTRODUCTION Fossil fuels such as petroleum oil, coal and natural gas are used as a primary energy source in developed nations. These carbon rich fuels release CO2 to the environment which has a negative effect on the atmosphere. It alters the radiation-balance of the earth and promotes global warming [1]. This has forced the consumers to think of alternate sources which would be cheap at least in the long run. Due to awareness of pollution and economics of fuel, the focus is now shifted to solar and other clean energy sources. Parabolic trough technology is currently the lowest-cost concentrating solar power (CSP) technology for electricity production [2]. Parabolic trough collector (PTC) uses a highly reflective surface to focus incident solar rays on a heat collector element (HCE) also called receiver tube. The receiver tube is placed at the point of convergence (focal point of parabola). The tube contains a working fluid that absorbs solar heat and gets heated up to temperatures of 350o C or more. It is enveloped by an evacuated (vacuumed) glass tube to reduce convective heat loss to the surrounding. The collector has a disadvantage of smaller angle of view. Therefore, to maximize the solar heat gain, a tracking mechanism is used to align it with respect to the changing position of the sun. Collector is being considered for a lot of applications like Enhanced Oil Recovery (EOR) [3], water disinfection in third world countries [4], desalination [5], refrigeration and cooling [6], heating applications [7] etc. Many innovativ...

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Ageing of pultruded glass fibre reinforced polymer composites exposed to combined environmental agents

Cited by 81 publications

References 23 publications

Long-term bending performance and service life prediction of pultruded Glass Fibre Reinforced Polymer composites

Long-term bending performance and service life prediction of pultruded Glass Fibre Reinforced Polymer composites

Untitled

Design, Simulation and Manufacturing of an Integrated Composite Material Parabolic Trough Solar Collector

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