In this paper,the kinematically admissible velocity field with surface crack on forwardextruding bar is put forward during the axisymmetric cup-bar combined ext
Based on the working of Lighthill and Hunt et al.,in the present paper the author hasestablished the topological rules adapting to analysing the skin-friction l
In this paper,a kind of rationalism theory of shell is established which is of differentmechanic characters in tension and in compression,and the finite element