SOME MISUNDERSTANDINGS ON ROTATION OF CRYSTALS AND REASONABLE PLASTIC STRAIN RATE

It is pointed out that crystals are discrete but not continuous materials. Hence the rotation R in decomposition F = RU and spin W in F F-1 are not correct. Errors will arise in plastic deformation rate if it is directly expressed with amounts of velocity of slips in glide systems such as γv n . The geometrical figure of crystal lattices does not change after slips and based on this idea a simple way in mechanics of continuous media to get the plastic deformations rate induced by slips is proposed. Constitutive equations are recommended.

作 者： 趙祖武   作者單位： Department of Mechanics, Tianjin University, Tianjin 300072, P R China  刊 名： 應用數學和力學(英文版)  EI SCI 英文刊名： APPLIED MATHEMATICS AND MECHANICS(ENGLISH EDITION)  年，卷(期)： 2001 22(1)  分類號： O344.3  關鍵詞： finite strain   rotation   misunderstanding   polycrystals   plastic deformation rate  

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