| GFRP has many excellent properties and has been used in many fields.It is mainly used in the field of wind power in our country.The service environment of wind turbine blades is complex.The natural service environment by ultraviolet light,temperature,rainfall,wind erosion will lead to decrease the performance of wind turbine blades and reduce the service life of the fan blades,so we need to conduct a detailed comparative study on the wind turbine blade material.In this paper,the properties of GFRP composites under UV irradiation,high temperature and low temperature were studied.The finite element model was used to simulate the effects of different temperature conditions on the static tensile and flexural properties of GFRP laminates.In this paper,glass fiber reinforced epoxy vinyl ester resin and glass fiber reinforced unsaturated polyester resin composite material as the research object,mainly completed the ultraviolet aging,high temperature(120℃),low temperature(-30℃)aging test.And the following research: Test of two kinds of laminates physical properties and static mechanical properties before and after aging,analyzes the evolution of the two kinds of laminates and performance,using opticalmicroscopy and scanning electron microscopy on the specimen surface and fracture morphologies were analyzed by infrared spectroscopy,the structure of the two kinds of laminates was analyzed by ftir;the static behavior of EVE/GF laminates under high temperature and low temperature was simulated by ANSYS software,and the results were compared with the experimental results.The test results of(EVE /GF)and(UP /GF)two laminates performance: UV aging treatment after 672 h and mechanical properties of two specimens were decreased,(EVE /GF)which is sensitive to the larger decline in UV aging;high and low temperature aging treatment after 672 h,two kinds of laminated plate bending,tensile strength decreased,among them,(UP /GF)is more sensitive to temperature,larger decline.The infrared spectrum analysis showed that the chemical structure of the two kinds of laminates was changed after UV aging 672 h,which was caused by the photo oxidation and hydrolysis reaction of the resin matrix;High temperature aging after 672 h the(UP /GF)and(EVE /GF)specimens of molecular chain rupture,a chemical change takes place,but it shows that(EVE /GF)specimen has better high temperature properties.After low temperature aging 672 h,the structure of the two kinds of laminates did not change,which indicated that these two kinds of resins had good low temperature resistance.The results that the mechanical properties of(EVE /GF)materialis simulated by finite element method show that: simulation results are in conformity with the experimental resultsand the results of simulation and experiment are within the error range. |
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