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综述了聚合物注塑残余应力的研究进展,详细介绍计算残余应力所用的理论模型及其基本概念.注塑制品残余应力由两部分组成,并且有不同的测试方法,这些应力是造成制品翘曲变形的原因.对于残余流动应力,重点分析本构模型的发展和注塑控制方程的建立;对于残余热应力,则讨论了冷却过程中的相交问题,以及热粘弹性模型在应力分析中的应用;最后介绍测量残余应力的几种实验方法.
The research progress of residual stress in polymer injection is reviewed. The theoretical model and its basic concepts for calculating residual stress are introduced in detail. Residual stress injection molding products from two parts, and there are different test methods, these stress is the cause of warping deformation products. For the residual flow stress, the development of the constitutive model and the establishment of the injection molding control equation are emphatically analyzed. For the residual thermal stress, the intersection of the cooling process and the application of the thermal viscoelastic model in the stress analysis are discussed. Finally, the measurement residual Several experimental methods of stress.