Global - Local Modelling
Part of the building block approach as defined by Mil-Hdbk-17 includes
the design and conducting of increasingly more complicated tests
that evaluate more complicated loading situations with the possibility
of failure from several potential failure modes. These experimental
data may be compared to analytical predictions and adjust analysis
models as necessary. The principal method of modelling the structure
and hence designing the more complicated tests is through the use
of global/local finite element analysis. This technique allows the
complex geometry and loading of the aircraft structure to be modelled
realistically in the global model and the small damage events such
as cracks and delaminations to be modelled in the local model. The
code of choice for MERL in this form of modelling is
ABAQUS. |