Revision of the Recent Heterogeneous Solid Object Modeling Techniques

This paper discusses the most recent and common technologies for modeling heterogeneous objects composed of morethan one material type. Researchers have found the great need for heterogeneous modeling of objects in order to get therequired properties of the object material. Eight technologies for modeling heterogeneous objects have been explained anddiscussed in this review paper. The advantages and disadvantages of each method have been introduced. Two applications ofheterogeneous objects were introduced, the heterogeneous turbine blades and the heterogeneous flywheel. Comparison of themost common methods of rapid prototyping has been made in the review.It has been found that all present heterogeneous modeling technologies have many limitations. So, there it is required todevelop an effective heterogeneous modeling technology that takes into consideration both the design geometry and thematerial composition simultaneously. Using wavelets in the mathematical representation of heterogeneous objects mightgreatly help in finding that perfect technology