Inclusion is one of the main causes for unqualified wire. However, the forming mechanism of drawing fracture due to inclusions is still unclear. Therefore, it is significant to figure out the forming mechanism of wire drawing fracture with inclusions for designing and manufacturing high-quality wires. In this paper, a physical model of wire with inclusion is established based on experimental observations. Multipass drawing is simulated by using finite element method (FEM) with the developed numerical damage modeling. Numerical results demonstrate that the damage increases with the development of drawing progress, and the damage caused by high elastic modulus of inclusion is greater than that of low elastic modulus. Pen-tip shaped fracture of wire with inclusions is mainly caused by the superposition of core and external V-shaped damage. Furthermore, the core V-shaped crack will propagate along the external V-shaped damage area.

中文翻译：

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多道次拉拔过程中夹杂线材损伤行为的数值分析

夹杂物是导致焊丝不合格的主要原因之一。然而，夹杂物导致拉拔断裂的形成机制尚不清楚。因此，弄清夹杂物拉丝断裂的形成机理对于设计和制造优质线材具有重要意义。在本文中，基于实验观察建立了包含夹杂物的线材物理模型。通过使用有限元方法 (FEM) 和开发的数值损伤模型来模拟多通道绘图。数值结果表明，损伤随着拉深的发展而增加，夹杂物高弹性模量引起的损伤大于低弹性模量引起的损伤。夹杂线材的笔尖形断裂主要是由线芯和外部V形损伤叠加造成的。