Hi everyone, recentely I did a simulation work on the incipient yield surface of nano-voided single crystal Cu, in [100]-[010]-[001] crystalline system. Together with the size effect on yield strength studied, the macroscopic incipient yield surface for Cu is expected to be predicted. Also, I try to build the relation between the loading modes and failure pattern, but I really don't understand the defected atomistic pattern clearly. So any suggestion or discussion on this part would be appreciated. Thank you for attention. Detailed description seen in attachment file.