Effect of delamination defects on mechanical properties of CFRP laminates
Carbon fiber resin-based materials possess high strength and stiffness and are widely used in aerospace and automo-tive applications.However,delamination defects in carbon fibers can greatly affect the mechanical properties of the materials.There-fore,it is of great engineering significance to study the effect of delamination defects on the mechanical properties of carbon fiber resin matrix composite(CFRP)laminates such as tensile,compressive,shear and flexural properties.Using a composite molding process,polytetrafluoroethylene sheets were added to the composite material,and CFRP laminates with delamination defects were prepared by molding process,and the dimensions and morphology of the delamination region were examined to investigate the effects of delamination defects on the mechanical properties of CFRP laminates.It is found that the delamination defects can signifi-cantly reduce the compressive,shear and flexural strengths of CFRP laminates,and the larger the area of the delamination region,the smaller the compressive and flexural strengths of CFRP laminates,but the change of the area of the delamination region has less effect on the tensile strength.
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