Projects(51074052,50734002)supported by the National Natural Science Foundation of China
Friction coefficients in spread formulas were studied under low width-to-thickness ratio. The effects of all the factors on friction were considered as different roughness of surfaces. After lead rolling experiments i...
Item Sponsored by National Natural Science Foundation of China(51074052,50734002)
The weighted velocity field was simplified for analysis of hot strip rolling. Using the field and GM (geometric midline) yield criterion, the deformation power, friction power and shear power were obtained respectiv...
Sponsored by National Natural Science Foundation of China(51074052,50734002)
In order to analyze the hot tandem roiling force, a new logarithmic velocity field is proposed. Using the field and linear EA (equal area) yield criterion, the plastic deformation power for plate rolling is analyzed...
Sponsored by National Natural Science Foundation of China(51074052,50734002)
With mean yield(MY)criterion,an analytical solution of the collapse load for a defect-free pipe elbow under internal pressure is first obtained.It is a function of ratio of thickness to radius t0/r0,strain hardening...
Sponsored by National Natural Science Foundation of China (51074052,50734002)
The dual-stream function velocity field is reduced in order to analyze two-dimensional plate broadside roll- ing in roughing. The strain rate vector inner product and integral mean value theorem, as well as coqine vec...