|
A new performance index formulation aiming to attain fully
stressed designs for topology optimization problems
Fatih Mehmet Özkal* and Habib Uysal
Department of Civil Engineering, Atatürk University, 25240,
Erzurum, Turkey.
*Corresponding author. E-mail:
fmozkal@atauni.edu.tr.
Tel: 00904422314652.
Fax: 00904422360957.
Accepted 22 July, 2010 |
|
Evolutionary structural optimization (ESO) is a method
combining topology and shape optimization. Although ESO has
appeared on a simple foundation, many researchers up to now
have made many contributions and performance based
optimization, which incorporates performance indices to
decide the best topology through all the designs provided by
the optimization process, has been presented. Some
criterions that reflect the structural behavior have been
included in these procedures, however, all the former
indices developed, take just one of these criterions into
consideration such as stress, strain energy, displacement,
etc. This paper presents a new performance index
formulation, which is used to select the optimum design from
the optimization process by considering the fully stressed
design concept as the most affective criterion and deals
with the previously mentioned problem by reviewing earlier
studies. The efficiency and capability of the new index are
demonstrated by several design examples.
Key words:
Topology optimization, evolutionary method, performance
index, fully stressed design.
|
