NUMERICAL SIMULATION OF DELAMINATION PHENOMENON IN COMPOSITE LAMINATED BEAMS AND PLATES/SHELLS STRUCTURES USING THE 1D LRZ AND 2D QLRZ FINITE ELEMENTS

A. EIJO; E. OÑATE; S. OLLER

Conferencia; 17th International Conference on Composite Structures (ICCS/17); 2013

An alternative method to model delamination effects in composite laminatedbeams and plates/shells structures is presented in this work. The novelty of this methodis the use of one- and two-dimensional finite elements to discretize the geometry ofbeam and plate/shell structures, respectively. The key property of these finite elements,called LRZ (for beams) [1] and QLRZ (for plates and shells) [2], is the possibility tocapture the relative displacement between consecutive layers which occurs indelamination phenomenon. The mechanical properties of layers are modelling using acontinuum isotropic damage model [3].A briefly description of the LRZ and QLRZ finite elements is presented. Also, thelinearization of quasi-static problem and its implicit integrations scheme are shown.Finally, the performance of this method is studied in several examples where thereference solutions are the plane stress analysis for beams and the 3D finite elementanalysis for plates.