Y. Bazilevs, A.L. Marsden, F. Lanza di Scalea, A. Majumdar, and M. Tatineni University of California, San Diego A DDDAS Framework for Large- Scale Composite Structures Based on Continually and Dynamically Injected Sensor Data PhD Students/Postdocs: X. Deng, A. Korobenko, and J. Tippmann, AFOSR DDDAS Program Review, IBM TJ Watson Research Center, December 1-3, 2014
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A DDDAS Framework for Large- Scale Composite Structures ... · Y. Bazilevs, A.L. Marsden, F. Lanza di Scalea, A. Majumdar, and M. Tatineni University of California, San Diego A DDDAS
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Y. Bazilevs, A.L. Marsden, F. Lanza di Scalea,
A. Majumdar, and M. Tatineni University of California, San Diego
A DDDAS Framework for Large-Scale Composite Structures Based on Continually and Dynamically
Injected Sensor Data
PhD Students/Postdocs: X. Deng, A. Korobenko, and J. Tippmann,
AFOSR DDDAS Program Review, IBM TJ Watson Research Center, December 1-3, 2014
Introduction Aircraft and rotorcraft designs increase in complexity
Number of parts
Materials employed
Electronics and control systems
Increased use of UAVs by the US military Expected to fly 48h+ missions
Expected to fly many missions
Need to operate for long times without failure
Heavy use of composite materials Military and commercial air vehicles
Durability and light weight
Prediction of the onset and progression of damage (critical to operation) in geometrically and materially complex aerospace composite structures becomes important! Creates a need for a sophisticated DDDAS (concept attributable to
Dr. Darema) framework proposed in this project
Why DDDAS? Data coming from sensors alone is, in general, insufficient
to make predictions about damage Realistic data coming from an engineering system of interest (+)
Limited to a relatively small number of spatial points (-)
Data on quantities that are not directly linked to failure (-)
Data coming from computational models alone is, in general, insufficient to make predictions about damage Rich, 3D, time-dependent data set (+)
Access to quantities directly related to local damage (+)
Many assumptions about geometry, materials, constitutive models, BCs, ICs, etc., are (often crude!) approximations of reality (-)
Advanced simulations informed by sensor and measurement data is the pathway to realistic predictions in general, and damage/failure prediction for specific structural systems of interest – key tenet of DDDAS.
Methodology:
Advanced modeling and simulation
Time-dependent, 3D complex geometry, non-linear
material behavior
Progressive and fatigue damage modeling in
composite materials
High-fidelity data outputs (stress and damage field
distributions)
Isogeometric Analysis (IGA) for structural mechanics
Efficiency, robustness and suitability for DDDAS
A full-scale 3D composite blade structure with built-in
structural defects
Verification and validation
Instrumented with ultrasonic sensor arrays, infrared