Abstract
Numerous experimental studies of damage in composite laminates have shown that
intralaminar (in-plane) matrix cracks lead to interlaminar delamination (out-of-plane) at
ply interfaces. The smearing of in-plane cracks over a volume, as a consequence of the
use of continuum damage mechanics, does not always effectively capture the full extent of
the interaction between the two failure mechanisms. A more accurate representation is
obtained by adopting a discrete crack approach via the use of cohesive elements, for both
in-plane and out-of-plane damage.
The difficulty with cohesive elements is that their location must be determined a priori
in order to generate the model; while ideally the position of the crack migration, and
more generally the propagation path, should be obtained as part of the problem’s solution.
With the aim of enhancing current modelling capabilities with truly predictive capabilities,
a concept of automatic insertion of interface elements is utilized. The consideration of a
simple traction criterion in relation to material strength, evaluated at each node of the
model (or of the regions of the model where it is estimated cracks might form), allows
for the determination of initial crack location and subsequent propagation by the insertion
of cohesive elements during the course of the analysis. Several experimental results
are modelled using the commercial package ABAQUS/Standard with an automatic insertion
subroutine developed in this work, and the results are presented to demonstrate the
capabilities of this technique.
Original language | English |
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Title of host publication | 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 16th AIAA/ASME/AHS Adaptive Structures Conference,10th AIAA Non-Deterministic Approaches Conference, 9th AIAA Gossamer Spacecraft Forum, 4th AIAA Multidisciplinary Design Optimization Specialists Conference |
Publisher | American Institute of Aeronautics and Astronautics |
Number of pages | 13 |
ISBN (Electronic) | 9781600869938 |
ISBN (Print) | 9781605603551 |
DOIs | |
Publication status | Published - 10 Apr 2008 |
Event | 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 16th AIAA/ASME/AHS Adaptive Structures Conference 10th AIAA Non-Deterministic Approaches Conference 9th AIAA Gossamer Spacecraft Forum 4th AIAA Multidisciplinary Design Optimization Specialist Conference - Schaumburg, IL, United States Duration: 07 Apr 2008 → 10 Apr 2008 |
Conference
Conference | 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 16th AIAA/ASME/AHS Adaptive Structures Conference 10th AIAA Non-Deterministic Approaches Conference 9th AIAA Gossamer Spacecraft Forum 4th AIAA Multidisciplinary Design Optimization Specialist Conference |
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Country/Territory | United States |
City | Schaumburg, IL |
Period | 07/04/2008 → 10/04/2008 |