Energy absorption in composite plates undergoing elastoplastic deformation using analytical sensitivity and hybrid optimization

Aditi Chattopadhyay, Ruijiang Guo

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

1 Scopus citations

Abstract

An analytical design sensitivity analysis procedure is developed to calculate the sensitivity of energy absorption of composite plates undergoing rate elastoplastic deformation using the direct differentiation approach. The procedure is implemented using the finite element method. The sensitivity analysis procedure is combined into an optimization procedure to maximize the energy absorption capability of composite plates. Constraints are imposed on the critical buckling load and the middle plane deflection. A hybrid algorithm is used which allows the inclusion of both continuous and discrete design variables. The K-S function approach is used to combine the objective function and constraints into a equivalent single objective function. The two-point exponential approximation technique is used within the optimization for evaluating the objective function and constraints to reduce the number of costly nonlinear finite element analyses. Results indicate a significant increase in energy absorption capability, with a reasonable amount of computational effort, when compared to a reference design.

Original languageEnglish (US)
Title of host publicationAnnual Forum Proceedings - American Helicopter Society
PublisherAmerican Helicopter Soc
Pages961-970
Number of pages10
Volume2
StatePublished - 1996
EventProceedings of the 1996 52nd Annual Forum. Part 1 (of 3) - Washington, DC, USA
Duration: Jun 4 1996Jun 6 1996

Other

OtherProceedings of the 1996 52nd Annual Forum. Part 1 (of 3)
CityWashington, DC, USA
Period6/4/966/6/96

ASJC Scopus subject areas

  • Aerospace Engineering
  • Transportation

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    Chattopadhyay, A., & Guo, R. (1996). Energy absorption in composite plates undergoing elastoplastic deformation using analytical sensitivity and hybrid optimization. In Annual Forum Proceedings - American Helicopter Society (Vol. 2, pp. 961-970). American Helicopter Soc.