Chemical ageing effects on the ply and laminate strength of a filament wound cross-ply GFRP

O Rodera,T Pärnänen,J Jokinen,M Lindgren,E Sarlin,M Kanerva

doi:10.1016/j.compstruct.2020.113508

O Rodera, T Pärnänen + Show 4 more

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https://doi.org/10.1016/j.compstruct.2020.113508

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Abstract

This work presents a numerical approach to multi-routines based on experiments, and, with a target to analyse strength of a cross-ply glass fibre reinforced plastics (GFRP) composite after immersion in sulphuric acid solution under pressure (5% H2SO4 solution, 95 °C, 15 bar). Two alternative vinyl ester resins (bisphenol A diglycidyl ether and epoxy phenol novolac) were investigated. After 0.5, 1, 1.5 and 2 years of conditioning, the specimens were mechanically tested. The multi-scale definition of the material system and its virtual conditioning were performed in a finite element (FE) model. The Hashin 3D failure criterion was implemented by coding the UMAT subroutine when using the Abaqus software. The experimental results demonstrated better performance of the bisphenol A vinyl ester resin-based GFRP when a thin barrier layer is used. The numerical results indicated that the shear strength property was the most susceptible at weak zones to present a tendency for degradation after one year of conditioning.

Highlights

Filament winding is a method for producing tubular, rotationally symmetric products made of composite materials
This work presents a numerical approach to multi‐routines based on experiments, and, with a target to analyse strength of a cross‐ply glass fibre reinforced plastics (GFRP) composite after immersion in sulphuric acid solution under pressure (5% H2SO4 solution, 95 °C, 15 bar)
They are typically composed of glass fibre reinforced plastics (GFRP) with several applications in the chemical industry

Summary

Introduction

Filament winding is a method for producing tubular, rotationally symmetric products made of composite materials They are typically composed of glass fibre reinforced plastics (GFRP) with several applications in the chemical industry. The applications of these materials are various tubes, storage tanks and vessels that often need to seal gas or liquid inside. The changes in the evolution of the mechanical behaviour can be degraded by the chemical environment during the operational lifetime of the material and structure. This can include the effects of moisture, temperature, pressure and chemicals that are typically referred to as ageing. An advanced resin to be used as the matrix component is vinyl ester, which possesses good corrosion resistance and mechanical properties making it suitable for many industrial applications [4,5,6]

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