Composites Part B 40(2), 158-165, 2009
G. Wimmer1, C. Schuecker2, H.E. Pettermann1
1Institute of Lightweight Design and Structural
TU Wien, Vienna, Austria
2NASA Postdoctoral Program, Langley Research Center
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.