Genetic algorithms (GA's) are powerful tools for the design of laminat
ed composite structures, and can easily handle the discrete nature of
the stacking sequence design problem. The paper discusses new strategi
es and operators for laminate design problems, and demonstrates their
application to the stacking sequence design of unstiffened and stiffen
ed composite panels under combined in-plane loads. The power of the GA
based design procedure is illustrated by comparing the discrete desig
ns with those obtained using continuous optimization methods like sequ
ential linearization. Implementation of new strategies results in subs
tantial reduction in the number of analysis required. Not only are bet
ter designs obtained, but the GA approach easily generates multiple an
d near optimal design alternatives