Study On The Mechanical Properties Of Phenolic/Glass Fiber Composite

Phenolic resin/glass fiber composite material is widely used in the aircraft cabin floor, partition, wall panels, ceiling, baggage compartment, cargo compartment lining etc because of excellent properties of flame resistance, low smoke, low toxicity, low thermal release, the best decorative properties and high structural strength and so on. Phenolic resin/glass fiber composite material mechanical properties were studied for determining whether the newly developed phenolic resin/glass fiber composite materials could meet the requirement of design and use, in order to provide the structure design and strength analysis of performance data.In this paper, the tensile, compression, bending, interlayer shear, and vertical and horizontal shear mechanical properties of the Repreg-7010and Repreg-7040phenolic resin/glass fiber composite material laminate were researched in-55℃,20℃dry/wet,71℃dry/wet and93℃dry/wet. The influence of different temperature and wet processing on the mechanical properties of phenolic resin/glass fiber composite material laminate was discussed, and the sample fracture is analyzed.The results as follows:With the increase of temperature, the tensile strength, compression strength, bending strength, shear strength vertical and horizontal shear strength of two kinds of phenolic resin/glass fiber composite materials laminate Repreg-7010and Repreg-7040decreased at different level, but the reducing magnitude showing a significant dispersion.At the same temperature, the tensile strength, compression strength, bending strength, interlayer shear strength, vertical and horizontal shear strength of the samples after wet processing were significantly lower than under dry condition.And the bending fracture mechanism of two kinds of composite material laminate are basically the same.The maximum deflection of the sample increased with temperature rising when bending failure.Tensile failure occurred from the lower surface under low temperature,then compression failure occurred from upper surface under the high temperature.Delamination damage occurred on upper surface of the Repreg-7010dry samples and on the lower surface under20℃wet condition when interlaminar shear and bending deformation occurs on71℃and93℃wet samples.Delamination damage occurred on upper surface of the Repreg-7040laminates under-55℃and on the lower surface under20℃,71℃,93℃and bending deformation occurs on71℃and93℃fracture samples.Brittleness breakage occurred of the Repreg-7010and Repreg-7040laminate samples under low temperature when vertical and horizontal shear,and serious delamination damage occurred of the Repreg-7010dry laminate samples under71℃and93℃,and some delamination damage occurred of the Repreg-7040samples when it was broke,but delamination is lightly than Repreg-7010samples.Compared with the standard data, the result from this experiment show that the performance of Repreg-7010and Repreg-7010laminates satisfy the standard under20℃dry condition. By comparing the performance of Repreg-7010laminates and Repreg-7040laminates,the result from this experiment show that the performance of Repreg-7010laminates is better than Repreg-7040laminates.