Research of conical die bulging based on finite-element simulation;

Solution to the bulging problem in the open die cold extrusion for slpine shaft and relevant photoplastic theoretical study;

The article is about how to adapt air hammer to perform local upsetting operation.

Methods and FE Simulation of Improving Quality of Upsetting;

Compare and Analyse of Unit Deforming Force and Boundary Conditions in Model Element of Cylinder Upsetting;

Study on the law of temperature influence on brass upsetting microforming;

Engineering application of the upsetting straight thread bar’s connection technique;

Effect of annealing temperature on microstructure and transverse ductility of upset pure Mo bars

The deformation extent of metal decreases from top to bottom along longitude direction during upset and changes into cylinder,accumulating deformation exists during processing,the shape phenomenon is not observed and the ove.

The evolution of 3-D disturbance T-S wave is studied in the spatial processes,and the effects of form and distribution structure of local roughness on the growth rate of the 3-D disturbance wave and the flow stability are discussed.

Based on a theoretical model for large eddy structure,the basic disturbance flow induced by the localized rough wall was simulated by distributing localized suction and blowing,to investigate the nonlinear effect of the local roughness on the large eddy structure.