Through introducing the meanings, contents, bases and significance of the structural concept design and wide analysis on it in points of view of rigidity theory, material availability and co-operative action principle, the importance of concept design is presented, and how to consider and apply this thought to structure design is proposed.

Combining with the material failure rule, shear failure and element deletion in ABAQUS, this study has realized the separation of the chip in cutting process from the work-piece and obtained correlated change tendency of stress, strain and the cutting force in the cutting process, which is conformed to the cutting theory.

By the finite element method,the linear and nonlinear deflections are calculated for the simple supported beams with original and equivalent materials properties.

This paper gives a general introduction of material selection and dimension calculation of hanger rods in Shanghai Boiler Works Ltd.

The material selection and the mounting method of the nozzle for SF 6 circuit breaker arc-quenching chamber are discussed,which could be referenced to design,material selection and improvement of mounting quality of the nozzle.