Evolution of Static and Dynamic Properties of Gfrp Laminates during Ageing in Deionized and Seawater

Abstract

GFRP laminates are widely used for constructional purposes of boats and wind turbines. During the operation of elements made of these materials in environmental conditions they are subjected to contact with aggressive media like seawater. In this paper the authors evaluated the degradation process of GFRP laminates at the different stages of ageing in deionized and seawater based on evolution of static and dynamic properties. The analysis of evolution of tensile properties as well as dynamic moduli and characteristic temperatures of transition allow for concluding about the nature of the degradation mechanisms during ageing in various media. Obtained results allow describing this process, which can be applied at the stage of design as well as operation of GFRP elements contacted with water.

Water Immersion Aging of Epoxy Resin and Fique Fabric Composites: Dynamic–Mechanical and Morphological Analysis

“…This behavior reveals that the aging effectively suppresses the polymeric chains mobility, resulting in a broadening of the T g range. Such behavior is related to the degradation processes such as plasticization, residual stress relaxation, hydrolysis and so forth [19,54]. Despite this, based on the presented results, it is not possible to differentiate these phenomena and individually evaluate their influence on the degradation process.…”

“…DMA tests are mainly considered to study modifications in the composite, with the incorporation of fiber and the performance as a function of properties. The current literature presents ample findings in this field [10,16,17,[19][20][21]. However, there is an absence of DMA studies on water-immersion-accelerated aging in natural fiber-epoxy composites.…”

The investigation of hardness and density properties of GFRP composite pipes under seawater conditions

“…Summerscales (2013) observed the strength of epoxy and vinyl ester resins as a function of aging time and temperature. Katunin et al (2015) studied the effect of deionized and natural seawater ageing on the change of static and dynamic characteristics of GFRP composite laminates such as hardness, Young's modulus and tensile strength. They observed a decrease in structure strength and found lower hardness values than unaged GFRP composite material.…”