Study on Mechanical and Physical Behaviour of Hybrid GFRP

Abstract

The paper discusses the mechanical and physical behaviour of hybrid glass fibre reinforced plastic (GFRP). Hybrid GFRP was fabricated by three different types of glass fibre, namely, 3D, woven, and chopped, which were selected and combined with mixture of polyester resin and hardener. The hybrid GFRP was investigated by varying three parameters which were the composite volume fractions, hybrid GFRP arrangement, and single type fibre. The hybrid GFRP was fabricated by using open mould hand lay-up technique. Mechanical testing was conducted by tensile test for strength and stiffness whereas physical testing was performed using water absorption and hardness. These tests were carried out to determine the effect of mechanical and physical behaviour over the hybrid GFRP. The highest volume fraction of 0.5 gives the highest strength and stiffness of 73 MPa and 821 MPa, respectively. Varying hybrid fibre arrangement which is the arrangement of chopped-woven-3D-woven-chopped showed the best value in strength of 66.2 MPa. The stiffness is best at arrangement of woven-chopped-woven-chopped-woven at 690 MPa. This arrangement also showed the lowest water absorption of 4.5%. Comparing the single fibre type, woven had overtaken the others in terms of both mechanical and physical properties.

Fatigue life of pitch- and stall-regulated composite tidal turbine blades

“…The polymers normally used in GFRP can absorb up to 5% water by weight when immersed for long periods, changing the mechanical properties (e.g. reducing static tensile strength of the material by more than 25%) [14]. Water diffuses into the polymer matrix [13] and the multidirectional nature of laminates complicates the fatigue damage mechanisms.…”

Hybrid Carbon/Glass Fiber Reinforced Polymer; A Frontier Material for Aerospace Industry : A Review on Mechanical Properties Enhancement

“…It is further demonstrated that the stacking sequence is insignificant with regards to tensile properties but significantly influence the flexural and compressive properties. Baba et al [56] reported the findings of the mechanical and physical mode of hybrid glass fibre reinforced plastic (GFRP). Hybrid GFRP is formed by three types of glass fibre which are 3D, woven type and chopped type that are mixed with polyester resin as well as a hardener.…”

“…It was concluded that woven type recorded the highest value of modulus elasticity owing to its stiff and dense geometry as shown in Figure 4. Besides that, the mat interlocking pattern provides advantages for providing anisotropic behaviour [56]. This mechanism improves the fibermatrix interfacial shear strength.…”

Influence of Composite Fatigue Properties on Marine Tidal Turbine Blade Design

“…However, the research on the potential of using carbon fibre reinforced polymers (CFRP) in tidal blade design [9; 10] is ongoing [11]. The polymers normally used in GFRP can absorb up to 5% water by weight when immersed for long periods and this can reduce the tensile strength of the material more than 25% [12]. Material properties and design impact the life expectancy, and hence energy production from tidal turbines [13].…”

“…GFRP tends to absorb a small amount of water, typically less than 5% [12]. The water diffuses into the polymer matrix, changing its mechanical properties.…”