In this paper,the deformation principle of strip pulled through shoulder is studied by FEM simulation.

The deformation and mechanical state of sheet at shoulder largely affect the sheet forming performance That is a basic theory problem of sheet forming In this paper,the influence of shoulder radius,back tension and friction condition on strip pulled through shoulder are studied by FEM simulation The deformation and mechanical features of strip at different states are discusse

In this paper,the problem of a mode Ⅲ crack in a functionally graded strip is studied with the assumption that the reciprocals of the shear modulus is a linear function in the thickness direction,while the Possion s ratio is kept constant.