Modeling structural nonlinearities including damage using reduced order methods

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A reduced order model (ROM) for addressing nonlinear aeroelasticity problem, including both structural and aerodynamic nonlinearities, has been developed. The CFD-based procedure captures the essence of an aerodynamic system while reducing its computational complexity. An Eigensystem Realization Algorithm is used to convert the ROM unsteady aerodynamics into the LTI state space model. A reduction in the cost of the realization of the ROM kernel is obtained by the identification of the state-space model. A micro-macro composite analysis that includes nonlinear strain rate effects and is capable of modeling in situ defects, such as cracks and delaminations, is used in the structural analysis of polymer matrix composite laminates. These nonlinearities are included in nonlinear time invariant structural ROMs which are identified for various cases of strain rates. Aeroelastic analysis is conducted using the nonlinear state space model. The state-space model is a highly optimized decoupled system while retaining significant details of the aeroelastic system. The approach used is computationally efficient and will be an essential element in damage detection and structural health monitoring (SHM) where multiple solutions of the "forward" problem is necessary in order to solve the inverse problem.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Pages7272-7289
Number of pages18
Volume7
StatePublished - 2007
Event48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Waikiki, HI, United States
Duration: Apr 23 2007Apr 26 2007

Other

Other48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
CountryUnited States
CityWaikiki, HI
Period4/23/074/26/07

Fingerprint

Aerodynamics
Strain rate
Aeroelasticity
Polymer matrix composites
ROM
Damage detection
Structural health monitoring
Inverse problems
Delamination
Structural analysis
Laminates
Macros
Computational complexity
Identification (control systems)
Computational fluid dynamics
Cracks
Defects
Composite materials
Costs

ASJC Scopus subject areas

  • Architecture

Cite this

Rajadas, J., Chattopadhyay, A., & Munteanu, S. (2007). Modeling structural nonlinearities including damage using reduced order methods. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (Vol. 7, pp. 7272-7289)

Modeling structural nonlinearities including damage using reduced order methods. / Rajadas, John; Chattopadhyay, Aditi; Munteanu, Sorin.

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Vol. 7 2007. p. 7272-7289.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Rajadas, J, Chattopadhyay, A & Munteanu, S 2007, Modeling structural nonlinearities including damage using reduced order methods. in Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. vol. 7, pp. 7272-7289, 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Waikiki, HI, United States, 4/23/07.
Rajadas J, Chattopadhyay A, Munteanu S. Modeling structural nonlinearities including damage using reduced order methods. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Vol. 7. 2007. p. 7272-7289
Rajadas, John ; Chattopadhyay, Aditi ; Munteanu, Sorin. / Modeling structural nonlinearities including damage using reduced order methods. Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Vol. 7 2007. pp. 7272-7289
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