AIAA CASI MAO Conference - September 2008 - Victoria BC J. GAUDIN (AIRBUS) Structure Analysis contribution to multi-disciplinary optimisation - AIRBUS recent examples and perspectives. AIAA CASI MAO Conference – September 2008, Victoria BC Prepared & presented by Jocelyn GAUDIN - AIRBUS Structure Analysis R&T Manager With the contribution from Stephane GRIHON, Lars KROG and Michel MAHE
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AIAA CASI MAO Conference - September 2008 - Victoria BC J. GAUDIN (AIRBUS)
Structure Analysis contribution to multi-disciplinary optimisation -
AIRBUS recent examples and perspectives.
AIAA CASI MAO Conference – September 2008, Victoria BC
Prepared & presented by
Jocelyn GAUDIN - AIRBUS Structure Analysis R&T Manager
With the contribution from Stephane GRIHON, Lars KROG and Michel MAHE
AIAA CASI MAO Conference - September 2008 - Victoria BC J. GAUDIN (AIRBUS) Page 14
Virtual Structure Development
ROBUST OPTIMISATION Capability to rapidly explore, analyse and compare structural design options, with trade-off rankings not affected by slight changes later in the design process
VIRTUAL TESTING Capability to numerically predict the structural performance, from coupon to full-scale a/c with a quantified level of confidence
Fast, innovative, first-time right development. No unexpected result during physical tests.
AIAA CASI MAO Conference - September 2008 - Victoria BC J. GAUDIN (AIRBUS) Page 26
Next steps
3 technical challenges Increase the physical content of the simulation by developing advanced material
models Provide appropriate numerical framework: specific FE, manufacturing on
board, robust link with CAD, HPC platform (parallelisation purpose) Provide validation by more relevant structural testing including manuf.
Virtual testing as a key technology for exploration Numerical simulation of unconventional composites for design optimisation Validation by test on best candidates only
Perspectives given by composite materials Unconventional composites can provide additional structural performance Experimental evaluation of all options (thickness, lay-up, stacking sequence, fibre
volume, local fibre tailoring etc) is unfeasible, for time and cost reasons Much more complex link between design variables, performance and manuf. cost
AIAA CASI MAO Conference - September 2008 - Victoria BC J. GAUDIN (AIRBUS) Page 29
Delamination: Recent advances in propagation
Objective To be able to calculate accurately delamination propagation under dynamic load cases: mandatory for final damage state assessment of composite structures
Way of working; Trough Tests and correlations 1: Physics understanding 2: Assessment of current interfacial model, and associated computational control
3: Status on dynamic effects & potential assessment of enhanced model
Setting up of: o Dedicated dynamic delamination test o Specific crack growth measurement technique
o Dedicated numerical tool for material model assessment and computational control establishment
EADS IW, LMT Cachan, AIRBUS [Guimard, Allix, Pechnik, Thévenet]
AIAA CASI MAO Conference - September 2008 - Victoria BC J. GAUDIN (AIRBUS) Page 35
Conclusion and Way forward
Predictive composite damage model
3D joint analysis
Detailed structural FEM
Sub-component
Early and predictive Virtual Testing loop (global local global)
Probabilistic analysis
Way Forward:
More exhaustive and robust simulation-based Design Optimisation in preliminary phase : multi-scale high-fidelity parametric modelling
As-built structure simulation: Manufacturing constraints and variables in the engineering loop.
Versatile and Multidisciplinary HPC design framework
Structure Analysis is a major contributor to Design Optimisation Composite Structures already optimised in an industrial design process Significant degrees of freedom remain for further innovation
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