Investion And Simulation Of Mechanical Properties Of Carbon/glass Hybrid Composites

In the context of the development of “light weight,high modulu,high strength”w ind power,the paper took pure glass fiber reinforced epoxy resin matrix carbon fiber/glass fiber reinforced epoxy resin composite materials and pure carbon fiber reinforced epoxy resin composite materials as the research objects,explored their mechanics properties of composite materials,and observed the morphology of the samples.Ansys was used to establish SHELL99 shell model to explore the influence of hybrid ratio and layering method on the tensile properties of carbon-glass hybrid composites.The paper introduced the calculation method of specific strength and cost,specific modulus and cost to analyze the relationship between the performance and cost of carbon-glass hybrid composites and the volume content of carbon fiber.A blade model was established to compare the effects of stiffness on blades of different fiber reinforced composite materials.The 0° tensile test results showed that the tensile properties of carbon-glass hybrid composites gradually enhanced with the increase of the volume content of carbon fibers,with a maximum stretching of 899.92 MPa and a maximum tensile modulus of 71.18 GPa.It can be seen that the glass fiber laminates were destroyed by bursting,and the carbon fiber/glass composite laminates were mostly edge-layer peeling,and the pure carbon fiber laminates had many brittle fractures.The 90° tensile test results showed that the 90° tensile performance of the glass fiber laminate was the best,the highest tensile strength was 53.91 MPa,the tensile modulus were up to 12.68 GPa,the tensile strength of the carbon fiber laminates were lowest,about 49.5 MPa,The 90° tensile strength of glass hybrid laminates was slight ly lower than that of pure glass fiber laminates but was less affected by the carbon fiber volume content.Both pure glass fiber laminates and pure carbon fiber laminates were transversely integrally fractured,and carbon-glass hybrid laminates had cracks in the deformation zone but no obvious fractures.According to the 0° compression test results,the pure carbon laminates had the highest compressive strength and compressive modulus,which were 1014.3 MPa and 99.10 GPa,respectively.As the volume fraction of carbon fibers increased,the compressive modulus of carbon-glass hybrid composites gradually increased.The compression failure of hybrid laminates was mostly buckling and instability of the carbon/glass layer,the deformation of the pure glass fiber was small and the fiber layer of the pure carbon fiber laminate was broken.The in-plane shear test results showed that the in-plane shear strength of pure carbon fiber reaches 60.89 MPa,and the modulus was as high as 4.24 GPa,and the in-plane shear strength and modulus of pure glass fiber were the lowest,about 50.08 MPa and 3.74 GPa respectively.With the increase of carbon fiber volume content,the in-plane shear strength of carbon-glass hybrid composites increased slight ly,and the shear modulus didn't change significantly.From the research about the effect of different mixing ratios and glass fiber lay angle on the 0° tensile properties of carbon-glass hybrid composites can be seen that:there was posit ive correlation between tensile modulus and carbon fiber volume content.Under the same hybrid ratio,the tensile performance of the laminate with symmetrically laid fibers were better than these of the sandwich structure or asymmetric structure.Laminates with laying angle of ±45° had the highest strength and modulus,while those with glass fiber laying angle of ± 90° were the lowest.When in the range of 30° ?-90°,the laying angle increased,the simulated tensile strength and modulus increased slowly to the summit and then decreased sharply.The results of the relationship between the performance and cost of composite materials showed that: The cost performance of pure glass fiber composite materials was better than pure carbon fiber composite materials and carbon glass composite materials.When the carbon fiber volume content was less than 25%,the hybrid fiber composite material's cost performance dropped sharply,While the carbon fiber volume content was higher than 25%,the decline in cost performance became gently.The comparison and analysis results of the stiffness of different composite materials on the blades showed that: at the same blade distance,the stiffness of the blades using carbon fiber materials was higher than that of carbon-glass hybrid composites,and the stiffness of the blades of glass fiber composites was the lowest.Adding carbon fiber can effectively improve the blade stiffness.