Composites Part B 40(2), 158-165, 2009

A SEMI-ANALYTICAL MODEL FOR THE SIMULATION OF DELAMINATION IN LAMINATED COMPOSITES

G. Wimmer1, C. Schuecker2, H.E. Pettermann1

1Institute of Lightweight Design and Structural Biomechanics,
TU Wien, Vienna, Austria
2NASA Postdoctoral Program, Langley Research Center
Hampton, VA


Abstract - An approach for the numerical treatment of delamination in laminated composite components is presented. A first ply failure criterion is employed to predict delamination initiation, while delamination propagation is analyzed using linear elastic fracture mechanics. The combination of initiation and propagation criteria yields a conservative estimation of the load earring capacity of a structure. Furthermore, the growth stability, the sensitivity of the results with respect to a change in the interface properties, and the non-linear structural response caused by the delamination growth process are determined. Two structures are investigated, which show the capability of the proposed approach, a curved laminate and a double lap shear test specimen.
(hjb,090126)