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The paper deals with the determination of cohesive parameters of adhesive Scotch-Weld DP490 3M. Mode I of cohesive damage were examined. Experimental testing was performed on the test specimens to determine the mechanical properties of the adhesive. The results of the experimental testing were compared with the numerical simulation and analytical solution of the same test. The cohesive parameters of the adhesive were obtained from the numerical simulation. Cohesive parameters of adhesive can be used to design real adhesive bond.