Various deployable structures can be formed by connecting more than one hexahedral module together.

A three dimensional flow field simulation of a new screw element—FTX polygon in co-rotating twin screw extruder has been carried out by the ANSYS FEM package.

In the former paper , a three dimensional flow field simulation of a new mixing element FTX polygon was carried out in intermeshing co rotationg twin screw extrusion.

FTX polygon is a new type of screw element which is invented to meet the higher speed and efficiency development in co-rotating twin-screw extruder.

In the paper,post-processing techniques of finite element results based on tri-prism elements for electromagnetic field are studied.

In order to obtain structural characteristic of quadrangular prism unit of tensegrity and to make pre- paration for study on assembled large-span tensegrity structures, analysis was made on internal force and displacement of quadrangular prism unit of tensegrity under load by nonlinear finite element method (FEM).

To verify the theoretical analysis and find out structural behaviors of triangular prism unit,based on theoretical analysis and form finding analysis,applicable semispherical joint system is designed for practical unit.