Experimental Investigation of Carbon Fiber-reinforced Plastic Bonded with a DP6330NS Urethane Adhesive Using Single Lap-shear Joints under Fatigue Loading
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Adhesive bulk specimens were fabricated to analyze the mechanical properties of DP6330NS. Noncontact video extensometer was used to measure the distances between two markers in the longitudinal and transverse directions during the tensile tests for the adhesive bulk specimens. Single lap-shear joints (SLJs) were fabricated to determine the fatigue life of carbon fiber-reinforced plastic bonded with a DP6330NS urethane adhesive. A digital microscope was employed to measure the area of voids on the fracture surfaces of the SLJs. The measured tensile strength and Young’s modulus of the adhesive bulk specimens were 28.6 MPa and 2.05 GPa, respectively. Observation of the fracture surfaces on the SLJs revealed that the voids in the adhesive caused the fluctuation of the shear stress amplitude and shortened the fatigue life.
Abstract
Adhesive bulk specimens were fabricated to analyze the mechanical properties of DP6330NS. Noncontact video extensometer was used to measure the distances between two markers in the longitudinal and transverse directions during the tensile tests for the adhesive bulk specimens. Single lap-shear joints (SLJs) were fabricated to determine the fatigue life of carbon fiber-reinforced plastic bonded with a DP6330NS urethane adhesive. A digital microscope was employed to measure the area of voids on the fracture surfaces of the SLJs. The measured tensile strength and Young’s modulus of the adhesive bulk specimens were 28.6 MPa and 2.05 GPa, respectively. Observation of the fracture surfaces on the SLJs revealed that the voids in the adhesive caused the fluctuation of the shear stress amplitude and shortened the fatigue life.
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