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《金属学报》上开展讨论,对研究工作的发展是有益的。关于W_p态函数,在《金属学报》1976年第12卷第2期第245页已有讨论,鉴于所涉及问题的复杂性,谨提出以下参考意见供讨论: (1)请注意:塑性学的应变分项与塑性学原理之间有矛盾,分项时对可以分项的应变分量分项;在塑性原理中,又非用一般不能分项的平方根应变不可。W_p这个量,是在此种矛盾中出现的。平方根应变不能作严格分项,这就肯定W_p这个量不是严格的数量,是数学近似。这是弹性学和塑性学的区别之一。(2)态函数是热力学概念。W_p在塑性学中主要是塑性畸变功密度(不是名称问题),相应的态函数只存在于可逆状态。塑性准静态是不可逆状态,因而W_p不是态函数的密度或均匀变形中的态函数。
The discussion in the Journal of Metals is beneficial to the development of research. The W_p state function has been discussed in the Journal of the Society of Metallurgy, Volume 12, Number 2, 1976. Given the complexity of the issues involved, the following reference points are proposed for discussion: (1) Please note that plasticity There are contradictions between the principle of strain and plasticity, when the sub-items can be sub-items of the sub-items of strain; in the plastic principle, but not with the general can not sub-item square root of the root strain. This amount of W_p appears in this paradox. Square root strain can not be strictly sub-items, which is certainly W_p this amount is not a strict quantity, is a mathematical approximation. This is one of the differences between elasticity and plasticity. (2) The state function is the concept of thermodynamics. W_p in plasticity is mainly plastic work density (not the name of the problem), the corresponding state function exists only in the reversible state. Plastic quasi-static state is irreversible state, so W_p is not the state function density or uniform deformation in the state function.