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本文对生产中广泛应用的拉拔、缩颈、扩口和胀管等薄筒件锥面成形工序的应力应变进行了系统的理论分形,首次从总体上给出这些工序在 Mises 椭圆上的应变变化率及其应变分布,并将 Mises 椭圆上不同区域的应变分布曲线ε-ф与相应的变形区几何位置上应变分布曲线ε-r 做了对比,表达了几种特定加载途径下的应变变化规律。Mises 椭圆上的锥面成形应变曲线ε-ф能形象地说明薄筒件锥面应形工序应变变化规律的全貌。
In this paper, the stress-strain of the thin-shell conical surface forming process, such as drawing, constriction, flaring and expansive tube, which are widely used in production, are systematically theoretically fractalized. For the first time, the strain of Mises ellipse The rate of change and its strain distribution are compared and the strain distribution curve ε-ф in different regions of Mises ellipse is compared with the strain distribution curve ε-r in the corresponding deformation zone geometry, and the strain changes under several specific loading paths are expressed law. Mises ellipse conical surface forming strain curve ε-ф can vividly illustrate the conical surface of the thin cylinder should be able to shape the whole process of strain changes.