Study of the moisture/stress effects on glass fibre/epoxy composite and the impact of the interphase area

Effect of fibre topology on hygro-mechanical response of polymer matrix composites

“…As the material properties have been assumed to be unaffected during the entire process the two governing equations are uncoupled and they can be solved successively at every time step. Table 1 presents the properties of the materials used in the numerical examples [20].…”

“…The boundary moisture concentration is 2.29% [20]. A finite element model of the composite was developed based on 2D plane strain assumption.…”

“…In [20] a random microstructure was generated and its stresses have been studied. The maximum stresses and their locations have been reported.…”

Investigations on the Effect of Moisture on Stress Distribution in FRP Using Finite Element Methods

“…Moisture absorption characteristics of composites have been the subject of considerable investigation [1,2,4,8]where transient moisture diffusion under normal environmental conditions is approximated as a Fickian process and analytical models have been developed based on a homogenized model.Dewimille and Bunsell [3] presented effects of increase in temperature and moisture content on the tensile strength of different composites. joliff [5,6] studied water diffusion in unidirectional (UD) composite, associating experimental measurements, analytical and numerical modelling. Interphase is characterized by a higher molecular mobility than the bulk resin, which is a determining parameter for water diffusion.Marom G [7] reported that the short-term effect of water is to increase the mode I fracture toughness, while in the long run the toughness deteriorates.…”

Effect of Fatigue Testing and Aquatic Environment on the Tensile Properties of Glass and Kevlar Fibers Reinforced Epoxy Composites

“…These diffusion mechanisms generally lead to the following damages in the composites: degradation by a hydrolysis reaction of unsaturated groups within the resin [9,10], interfacial fracture [11][12][13][14], debonding [15] and interlaminar toughness [16][17][18][19][20]. Beyond these considerations, it is well known that water absorption also affects the mechanical behavior of composite materials globally [21][22][23][24][25][26][27]. In spite of these investigations, few works studied the combined effect of damage mechanics and environmental ageing on the ultimate properties of composite materials.…”