Modelling of Cracked Sandwich Specimen

• Type: Article in International Scientific Journal
• Date: 1999

Authors

Luísa Costa Sousa (Author) FEUP; António Mendes Ferreira (Author) FEUP

Journal

Title: Journal of Systemics, Cybernetics and Informatics

Vol. 6 No. 4

Pages: 330-331

ISSN: 1690-4524 (Online)

Other information

Abstract (EN): The cracked sandwich specimen, figure 1, is a test tool for the analysis of the behaviour of sandwich structures that was first proposed by Carlsson [1]. In this test, we strudy the fracture behaviour ot the adhesive and the failure of the core, as a function of the tilt angle (Fig. 1). In this paper the finite element analysis of such test is performed and the results are compared with the experimental values of Ref. [1]. The 2D formulation [2-5] is used with na elasto-plastic associative formulation. The adhesive is modelled by a joint element [6-8]. In figure 2 the finite element mesh is illustrated. Fig. 3 shows the evolution of the cracks and the evolution of the stresses through the core. Although the core cracks cannot be modelled by this modelled, it is seen that the evolution of yield stress patterns follow the experimental values. The opening stresses and the shear stresses versus the tilt angle are illustrated and compared with the experimental results [1]. The numerical results are in close agreement with the experimental results. Therefore, this analysis methods is capable of simulating the experimental testing of cracked sandwich specimens.

Language: Portuguese

Type (Professor's evaluation): Scientific

No. of pages: 2