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Dynamic nonlinear crack growth at interfaces in multi-layered materials

Corrado, Mauro and Paggi, Marco Dynamic nonlinear crack growth at interfaces in multi-layered materials. Procedia Materials Science, 3. pp. 1971-1976. (2014)

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Finite thickness interfaces, such as structural adhesives, are often simplified from the modelling point of view by introducing ideal cohesive zone models that do not take into account the finite thickness properties in the evaluation of the interface stiffness and inertia. In the present work, the nonlinear dynamic response of those layered systems is numerically investigated according to the finite element method. The weak form of the dynamic equilibrium is written by including not only the contribution of cohesive interfaces related to the virtual work exerted by the cohesive tractions for the corresponding relative displacements, but also considering the work done by the dynamic forces of the finite thickness interfaces resulting from their inertia properties. A fully implicit solution scheme both in space and in time is exploited and the numerical results for the double cantilever beam test show that the role of finite thickness properties is remarkable as far as the crack growth kinetics and the dynamic strength increase factor are concerned.

Item Type: Article
Identification Number: 10.1016/j.mspro.2014.06.317
Projects: ERC StG CA2PVM (GA no. 306622), FIRB RBFR107AKG
Funders: European Research Council, Italian Ministry of Education, University and Research
Subjects: Q Science > Q Science (General)
Research Area: Computer Science and Applications
Depositing User: Prof Marco Paggi
Date Deposited: 02 Oct 2014 08:50
Last Modified: 02 Oct 2014 08:50
URI: http://eprints.imtlucca.it/id/eprint/2286

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