Proceedings of the 19th International Conference on Composite Materials (Eds. S.V.Hoa, P.Hubert), pp. 2145-2153, BytePress, 2013

NUMERICALLY PREDICTED DAMAGE AND FAILURE ENVELOPES OF COMPOSITES FEATURING NONLINEAR MATERIAL BEHAVIOR

J. Gager1,2, M. Meindlhumer2,3, M. Schwab1,2, H.E. Pettermann1

1Institute of Lightweight Design and Structural Biomechanics,
TU Wien, Vienna, Austria
2Polymer Competence Center Leoben, Leoben, Austria
3FACC AG, Ried, Austria


Abstract - A simulation methodology is proposed which combines linear elastic analyses of large scale laminated composite structures and nonlinear unit cell predictions to account for local nonlinear material behavior at the ply level. In a two-step procedure nonlinear unit cell simulations are conducted first. The results can then be used to draw "energy dissipation envelopes" in stress and strain space and to perform post-processing on linear large scale structural analyses. Based on the concept of energy dissipation monitoring, the macroscopic material point exertion is assessed. The methodology is demonstrated using a generic nacelle structure built from laminated textile composites.
(hjb,130805)