Least-weight design of perforated elastic plates for given compliance: Nonzero Poisson's ratio

T. G. Ong, G. I.N. Rozvany, W. T. Szeto

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In earlier papers [1, 2], least-weight solutions were derived for perforated elastic plates having (a) a constant thickness, (b) a prescribed compliance value, and (c) a Poisson's ratio of zero value. In view of earlier mathematical studies by Kohn, Strang, Lurie et al., the above results were based on a microstructure in which ribs of first- and second-order infinitesimal spacing run in the two principal directions. It was found, however, that the optimal solution for axially symmetric plates always consists of (i) unperforated regions or/and (ii) regions with ribs in only one (i.e. the radial) direction. In view of extensive recent study of this problem by leading mathematicians, the above conclusions have important implications. In the current paper, the foregoing results are extended to plates having a nonzero Poisson's ratio and the theory is illustrated with examples. Two solutions given are valid for both prescribed compliance and prescribed deflections. This investigation shows that in some unconstrained shape optimization problems the optimal solution cannot be obtained by conventional numerical (e.g. finite element) methods.

Original languageEnglish
Pages (from-to)301-322
Number of pages22
JournalComputer Methods in Applied Mechanics and Engineering
Volume66
Issue number3
DOIs
Publication statusPublished - Feb 1988

    Fingerprint

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Computer Science Applications

Cite this