The plastic theory of composite material include three criterions: the yield criterion, the flow rule and the hardening rule.
复合材料的塑性理论通常包括三方面准则：屈服准则、流动准则和强化准则。
We discuss the dynamics problems of ideal rigid-plastic material in the flow theory of plasticity in this paper.
本文讨论了塑性流动理论中的理想刚塑性材料的动力学问题。
Aiming at SO2 gas pollution from BF-BOF process, an analytic model of sulphur flow was established based on the theory of industrial metabolism and the method of material flow analysis.
针对高炉-转炉流程生产过程产生的SO2烟气造成环境污染的问题，以工业代谢理论为基础，应用物质流分析方法，建立了工序的硫素流分析模型。
Aiming at SO2 gas pollution from BF-BOF process, an analytic model of sulphur flow was established based on the theory of industrial metabolism and method of material flow analysis.
针对高炉-转炉流程生产过程产生的SO2烟气造成环境污染的问题，以工业代谢理论为基础，应用物质流分析方法，建立了工序的硫素流分析模型。
Two different kinds of material flow control gates in bell-less tops are studied and compared. The advantages of the new style impeller MFCG in controlling material flow are demonstrated in theory.
比较研究了用于高炉无料钟炉顶的两种不同形式的料流调节阀的控制模型，从理论上阐述了新型叶轮式料流调节阀控制料流量的优越性。
Two different kinds of material flow control gates in bell-less tops are studied and compared. The advantages of the new style impeller MFCG in controlling material flow are demonstrated in theory.
比较研究了用于高炉无料钟炉顶的两种不同形式的料流调节阀的控制模型，从理论上阐述了新型叶轮式料流调节阀控制料流量的优越性。
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