③The generalized spatial resolution formula presented by Professor Ma Zai-tian can intrinsically expound the issue of NMO waveform stretching, and accordingly formed NMO formula can effectively remove the NMO stretching deform.

With introduction of the thermo-softening model at welding interfaces and according to the time of the tensile wave arrived at the interface, the binding strength can be confirmed.

From the direction of layer delamination and distribution of density,it can be illuminated that the fracture is caused by reflected tensile wave.

This article made a systematic study for measuring methods of extensional wave velocities using flexural and longitudinal resonance vibrations, and improved traditional measuring equipment arrangement of longitudinal resonance vibration.

Study on tensile deformation characteristic of CrMnN stainless steel with metastable austenite;

Interfacial structure and tensile deformation behavior of 16Mn/Zn composites

By using a mesomechanical analysis device,it was observed that during the tensile deformation of a copper bicrystal,the slipping ways and deforming amounts of two grains with different orientations are differential.

Optimization of loading trajectory for skin stretch forming process;

Deform-3D plastic molding simulation software was adopted to numerically simulate the course of stretch forming and forging reduction forming,finding that the process was feasible and capable of greatly decreasing the energy consumption and improving the production performance.

Loading trajectory is the key factor for aircraft skin stretch forming.

The punching process and die design of the colours copy machine lower plate were introduced in detail, specially after changed the part original forming process, carried on the drawing forming by the common press machine, the punching process condition changing, and successfully designed the die, it had a very good referential function.