Modeling structural nonlinearities including damage using reduced order methods

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

1 Scopus citations

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 - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Pages7272-7289
Number of pages18
StatePublished - Aug 6 2007
Event48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Waikiki, HI, United States
Duration: Apr 23 2007Apr 26 2007

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume7
ISSN (Print)0273-4508

Other

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

ASJC Scopus subject areas

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Modeling structural nonlinearities including damage using reduced order methods'. Together they form a unique fingerprint.

Cite this