resetting the displacement to zero（all phases）

Hi xin Fang,

Instead of resetting your displacements to zero for each Phase, you could examine the Phase displacements. Here, I will quote our Reference manual, which explains the two options in more detail. Namely:
The Phase Displacements option contains the different components of the accumulated displacement increments in the whole calculation phase, as calculated at the end of the current calculation step, displayed on a plot of the geometry. In other words, the phase displacements are the differential displacements between the end of the current calculation phase and the end of the previous calculation phase.

Dear Vasileios，

Thank you, I know I can do this as you said, but I would like to know that if I have a total of two phases (not including the initial phase), I reset the displacements in both phases to 0 (not resetting the small strain) and then add the total displacements in both phases. Whether the displacement that you get from doing this can be considered the total displacement of the whole process.
I would appreciate it if you could answer my question.

Dear Xin Fang,

By resetting the displacements you're basically manually doing the same as the option Sum Phase displacements. In some cases Sum Phase displacements can be considered the total displacements, and in other cases not. Quite often within one project there are both parts for which Sum Phase displacement works correct as total displacement and parts for which resetting the pre-deformation ignores important deformation information. There is no fixed rule here. 

With kind regards,

Dennis Waterman