Hong, Hong-KiHong-KiHongLiu, Chein-ShanChein-ShanLiu2008-10-232018-07-092008-10-232018-07-092000http://ntur.lib.ntu.edu.tw//handle/246246/85127application/pdf228135 bytesapplication/pdfen-USInternal Symmetry in the Constitutive Model of Perfect Elastoplasticityjournal article10.1016/S0020-7462(99)00030-X2-s2.0-0034187211http://ntur.lib.ntu.edu.tw/bitstream/246246/85127/1/2.pdf