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对于振动挤压成型的预应力管(以下称一阶段管)内部应力状态的研究是一项很重要的研究课题。研究和测试在制造阶段管内应力建立的过程及其分布规律是十分必要的,以切实了解和掌握一阶段管张拉工艺的特性,从而确定比较合理和较为准确的预应力值。为合理使用制管原材料、提高产品质量提供依据。为一阶段管理论计算提供确切
The study of the internal stress state of a vibration-extrusion prestressed tube (hereinafter referred to as a stage tube) is a very important research topic. It is necessary to study and test the process of stress build-up and its distribution in the manufacturing stage to effectively understand and master the characteristics of the one-stage pipe tensioning process, so as to determine a more reasonable and accurate prestress value. Provides the basis for the rational use of raw materials for the production of pipes and the improvement of product quality. Provides exact for a stage management calculation