Compos.Struct. 76, 162-173, 2006
C. Schuecker, H.E. Pettermann
Austrian Aeronautics Research (AAR),
Institute of Lightweight Design and Structural Biomechanics,
TU Wien, Vienna, Austria
A ply-level damage model for simulation of stiffness degradation due to
progression of damage in fiber reinforced laminates is presented.
The proposed damage model is based on damage mechanisms observed at the ply
level and hypotheses regarding their effect on material stiffness.
Focusing on matrix dominated failure modes, the damage behavior is split into
two contributions, damage evolution and damage effect.
The prior describes the progression of damage as a function of load, while the
latter predicts the effect of this damage by a fourth order tensor relation as
function of the current failure mode and stress state.
The model relies on six material parameters, whose identification by standard
tests is addressed.
By combining the damage model with classical lamination theory, the behavior of
laminates under plane stress loading is predicted.
The capabilities of the proposed damage model are assessed based on comparison
to experimental data from the literature.