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挤压方法是工业生产断面形状复杂的制品的一个主要方法。但是,报导分析这种挤压的资料不多。虽然通常采用轴对称形状的铸锭进行挤压,但是挤压所发生的数学问题不是轴对称的,而是三维塑性流变中的某个问题。使金属变形所需要的能量与变形量、变形速度和变形温度有关。挤压时,这三个变量只有变形量保持不变,如果要控制挤压过程,就需要一个数学模型。最有效的分析方法是Ziencewicz和Godbole提出的。这种方法采用了等参数元的限元分析模型,
Extrusion method is a major method of industrial production of complex cross-sectional shape of the product. However, there is not much information on the analysis of this squeeze. Although generally axisymmetric shaped ingots are used for extrusion, the mathematical problem with extrusion is not axisymmetric, but rather a problem in three-dimensional plastic rheology. The energy required to deform the metal is related to the amount of deformation, the rate of deformation, and the temperature of the deformation. When crushed, only the amount of deformation remains unchanged for these three variables, and a mathematical model is required if the crushing process is to be controlled. The most effective method of analysis is proposed by Ziencewicz and Godbole. This method uses the finite element analysis model of isoparametric element,