Reliability-based structural optimization using a multiscale material model

K. Solanki, E. Acar, M. Rais-Rohan, C. Eamon, M. Horstemeyer

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

1 Scopus citations

Abstract

In this paper, we present a methodology for reliability-based design optimization (RBDO) of structural components using a multiscale material model. This methodology focuses on the quantification of uncertainties in a multiscale material model, the influence of uncertainties on constitutive relationships at different strain rates, and the integration of such models into RBDO of structural components subject to multiple failure criteria. Metamodeling approximation is found to be a necessary component of this methodology when considering the noise and nonlinearity in failure indices of interest and the computational cost of RBDO with a multiscale material model. The application of this methodology is demonstrated in design optimization of an A356 cast aluminum alloy component. The accuracy and performance of several parametric and non-parametric metamodels are compared while investigating the effect of multiscale modeling on optimum design. The results show that Gaussian process provides the best metamodel for damage index. Moreover, the damage index in the design based on von Mises failure criterion is found to be twice that in the design based on the multiscale material model, although both designs have the same weight and maximum stress values.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Pages7684-7702
Number of pages19
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
Volume8
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

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ASJC Scopus subject areas

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

Cite this

Solanki, K., Acar, E., Rais-Rohan, M., Eamon, C., & Horstemeyer, M. (2007). Reliability-based structural optimization using a multiscale material model. In Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference (pp. 7684-7702). (Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference; Vol. 8).