Recent content by Paul Chen

I find in some textbook that the displacement 'step change' across the dislocation surface is plastic deformation, so the actual elastic displacement field is continuous at the surface and the total displacement field (discontinuous) is the sum of the elastic-displacement (continues) and the...

Thanks for your reply. Yes, this is a continuum model and the stress should be continuous (except at the dislocation line). But if you look at the displacement field, it is indeed discontinuous across the dislocation surface, where the displacement suddenly jump from 0 to b). Please see the...

Consider a screw dislocation, The displacement field is given by And the strain field is derived by My question is that the displacement seems discontinuous across the dislocation surface (y=0, i.e., displacement jump from 0 to b), so why it is still differentiable on the surface and why...