R. Elabdi et al., SHAPE OPTIMIZATION OF A PRESSURE-VESSEL UNDER PLASTIC-FLOW, PLASTIC INSTABILITY, WEIGHT AND FATIGUE LIFE CRITERIA, Computers & structures, 51(5), 1994, pp. 559-570
The structural shape optimization of a complex shell under complex cri
teria is presented. The shell is one of various cases of a turboshaft,
and optimization criteria are associated with the cost, the technolog
y, and above all the working conditions for the turboshaft. Optimizati
on criteria involved are of course the weight of the structure, but al
so the plastic flow, plastic instability and fatigue life. The fatigue
life criterion is an extension to the three-dimensional state of the
one-dimensional Lemaitre-Chaboche rule, taking into account the elasto
-plastic Neuber correction. All computations have been made with the A
NSYS finite element program in which an optimization module exists.