The Computational and Experimental Method of Estimating Crack Resistance of Adhesive Joints

Crack resistance is an important parameter determining the carrying capacity and durability of adhesive joints. The existing methods of estimating crack resistance do not always produce reliable results because the experimental data may include several interdependent parameters. Theoretical calculation of crack resistance is also a complex problem. The computational and experimental method that can increase the accuracy and reliability of crack resistance estimation of adhesive compositions is proposed. This method can be implemented using a test station that ensures loading of double glued cantilever beams by equal and oppositely directed moments. To determine specific crack advancing energy, the mathematical model that includes only one independent parameter (bending moment) is obtained. It has been established that the change in the dimensions of the cross section and thickness of the proposed experimental models has an insignificant effect on the value range of crack advancing energy.

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