[Back]


Talks and Poster Presentations (with Proceedings-Entry):

H. E. Pettermann, J. Gager, E. Rama Lista, T. Flatscher:
"Elasto-Plasto-Damage Modeling of Laminated Composites";
Talk: ECCOMAS 2012 (European Congress on Computational Methods in Applied Sciences and Engineering, Wien (invited); 2012-09-10 - 2012-09-14; in: "CD-ROM Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)", J. Eberhardsteiner, H. J. Böhm, F. G. Rammerstorfer (ed.); TU Wien, Wien (2012), ISBN: 978-3-9502481-9-7; Paper ID 3717, 7 pages.



English abstract:
Nonlinear Finite Element simulations are presented for modeling the mechanical response of laminated composites structures. The focus is set on progressive damage and failure simulations both in the plies and in the inter-ply interfaces, with a special emphasis on their interaction. Because of the computational demand in solving such highly nonlinear structural problems, a shell modeling approach is utilized. A nonlinear constitutive material law is employed for modeling the nonlinear response of continuous fiber reinforced polymers such as plies in a laminate. The model is formulated within the framework of continuum damage mechanics and accounts for stiffness degradation and unrecoverable strain accumulation. The inter-ply delamination is modeled by a cohesive contact model employing a traction separation type approach.

To demonstrate the application of the introduced modeling strategy nonlinear predictions on laminated composite structures are presented. A Three Point Bending test with a [0/90] layup is studied, and an L-shaped multi-layered crossply flange is investigated under transverse bending. The sequence of the occurring damage and failure modes is predicted as well as the interaction between them. The various nonlinear mechanisms can be correlated to nonlinearities in the load-displacement curves.

Created from the Publication Database of the Vienna University of Technology.