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Experimental determination of coupled cohesive laws with an unsymmetrical stiffness matrix for structural adhesive joints loaded in mixed-mode I+III by Stephan Marzi is a Engineering article available to read on EtoBox.

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Cohesive zone models are widely used to predict failure of structural adhesive joints in numerical simulations. According to the state of the art, the constitutive law for single mode-loading can be obtained by evaluating the J -integral and measuring the crack tip opening displacement. The behavior in mixed-mode is usually estimated by interpolating between the individual single modes. This manuscript presents a novel strategy to identify cohesive laws in mixed-mode I+III directly from experimental data. In contrast to identification methods in single mode, certain requirements must be met in mixed-mode in order to obtain a constitutive law. It turns out that these requirements cannot be fulfilled due to the physical behavior of adhesives, which can be viewed as a disadvantage of the proposed method. Therefore, the applicability of the proposed identification method is proven based on the results of numerical simulations and discussed with regard to possible limitations.

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Author

Stephan Marzi

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)