In present paper an improved multi-objective evolutionary algorithm is used for Pareto optimization of selected coupled problems.
Coupling of mechanical, electrical and thermal fields is considered. Boundary-value problems of the thermo-elasticity, piezoelectricity and
electro-thermo-elasticity are solved by means of finite element method (FEM). Ansys Multiphysics and MSC.Mentat/Marc software are used
to solve considered coupled problems. Suitable interfaces between optimization tool and the FEM software are created. Different types of
functionals are formulated on the basis of results obtained from the coupled field analysis. Functionals depending on the area or volume of
the structure are also proposed. Parametric curves NURBS are used to model some optimized structures. Numerical examples for exemplary
three-objective optimization are presented in the paper.