ESO for Shape Optimization and the Reduction of Stress Concentrations
Ever since the fonnulation of the general rules and fonnulae of structural mechanics, the focus of most analyses has been to find the maximum stress present in a given structure. This maximum provided the basis of a design limit despite the obvious fact that, often, the bulk of the surface of the structure was at a much lower stress. This chapter demonstrates how the ESO technique can be used to provide structural shapes where the boundary is evolved on the basis of making the, as yet unknown, surface fonn as evenly stressed as possible.
KeywordsShape Optimization Rejection Ratio Transition Length Neck Length Evolutionary Structural Optimization
Unable to display preview. Download preview PDF.
- Backlund, J. and Isby, R. (1988) Shape optimization of holes in composite shear panels. In: G.I.N. Rozvany and B.L. Karihaloo (eds.), Structural Optimization, Kluwer Academic Publishers, Dordrecht, 9–16.Google Scholar
- Durelli, A.J. and Rajaia, K. (1981) Minimizing stress with photoelasticity. Machine Design. 53(28), 125–130.Google Scholar
- Engineering Science Data Unit (1969) Elastic Stress Concentration Factors: Geometric Discontinuities in Flat Bars or Strips of Isotropic Materials, Amended 1979,251–259 Regent St., London, WIR 7AD, U.K.Google Scholar
- Falzon, B.G. (1996) An Investigation into the Buckling and Postbuckling Behaviour of Hat-Stiffened Composite Panels, PhD Thesis, Department of Aeronautical Engineering, University of Sydney.Google Scholar
- Haftka, R.T. and Grandhi, R.V. (1985) Structural shape optimization: - a survey. AIAA-85–0772, AIAAlASME/ASCE/AHS 26th Structural Dynamics and Materials Conf., Orlando, Florida.Google Scholar
- Heywood, R.B. (1969) Photoelasticily for Designers, Pergamon, Oxford.Google Scholar
- Peterson R.E. (1974) Stress Concentration Design Factors, John Wiley, New York.Google Scholar
- Tsai, S.W. (1988) Composite Design, 4th edn., Think Composites, Dayton.Google Scholar