Sociedad Española de Integridad Estructural
Grupo Español de Fractura

Sociedad Española de Integridad Estructural
Grupo Español de Fractura

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MIXED MODE DOUBLE CANTILEVER BEAMS TEST SPECIMEN FOR CHARACTERIZATION OF STRUCTURAL ADHESIVE JOINTS

J.C. Suárez  P. Pinilla  F. López  M.A. Herreros  M.V. Biezma    

Anales de la Mecánica de la Fractura, nº 27 . 2010 . Pág. -
Ver (.pdf): 109

Resumen: Numerical simulations or virtual testing are gradually replacing many expensive and time consuming experiments in the product design process. To be able to predict the performance of the adhesive joints accurately, correct material data of adhesives are essential. Hence, it is critical to develop reliable testing methods to obtain the constitutive behaviour of adhesive layers. For adhesive joints, it is convenient to let the constitutive relation represent the mechanical behaviour of the entire adhesive layer. Such a constitutive relation describes activities in the adhesive layer before and at fracture. The objective of this work is to experimentally obtain the constitutive behaviour of an adhesive layer under mixed mode loading. The Mixed Mode Double Cantilever Beams (MCB) specimen used in the experiments is designed to allow the adhesive layer to be loaded by a force varying smoothly from pure peel to pure shear. An explicit J-integral expression is derived for the MCB-specimen and used to evaluate the energy dissipation in the FPZ. The measured deformations of the adhesive layer in the FPZ show a nonlinear deformation path in all tested mode mixities and the critical deformation of the adhesive in the peel direction is virtually independent of the mode mixity. The constitutive behaviour of the adhesive layer is obtained by the inverse method. The obtained constitutive behaviour of the mixed mode loaded adhesive layer is coupled and mode dependent.

LocalizaciónPorto

Research Group on Hybrid Materials, ETS Ingenieros Navales, Universidad Politécnica de Madrid, Avda. Arco de la Victoria, s/n, 28040 Madrid, Spain.
Research Group on Hybrid Materials, ETS Ingenieros Navales, Universidad Politécnica de Madrid, Avda. Arco de la Victoria, s/n, 28040 Madrid, Spain.
Research Group on Hybrid Materials, ETS Ingenieros Navales, Universidad Politécnica de Madrid, Avda. Arco de la Victoria, s/n, 28040 Madrid, Spain.
Research Group on Hybrid Materials, ETS Ingenieros Navales, Universidad Politécnica de Madrid, Avda. Arco de la Victoria, s/n, 28040 Madrid, Spain.
Departamento de Ciencia e Ingeniería del Terreno y los Materiales, Universidad de Cantabria, Dique de Gamazo s/n, 39004 Santander, Spain.


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