Damage and fracture analyses of wire with V‐shaped microcrack on multi‐pass drawing under back tensions. Issue 11 (10th August 2022)

• Record Type: Journal Article
• Authors: Ma, Ao; Zhang, Yu; Dong, Liming; Yan, Hua; Fang, Feng; Li, Zhaoxia
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 45:Issue 11(2022)
• Page Start: 3183
• Page End: 3198
• Publication Date: 2022-08-10
• Subjects: back tension -- crack propagation -- fracture mechanism -- steel cord -- V‐shaped microcrack; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.13808
• Languages: English
• ISSNs: 8756-758X

Abstract

Abstract: Wire breakage has always attracted much attention in drawing. Mastering the mechanism of drawing fracture can effectively improve the quality of steel wire. In this study, the morphology of the fracture samples is analyzed. There are obvious V‐shaped microcracks in the materials by observing the microstructure. Base on the above results, the wire models with V‐shaped microcrack of different inclinations are established via the finite element method (FEM). Besides, the multi‐pass drawing under different back tension is simulated, and the process from crack propagation caused by damage to fracture is realized. The results show that microcrack has a great influence on the drawing fracture, and inclination is a key factor. With the increase of angle, the propagation rate of crack increases accordingly. Meanwhile, back tension will increase the accumulation of damage. The larger the back tension is, the larger the crack path is, which eventually leads to the formation of pen‐tip shaped fracture. Highlights: Steel wire with central V‐shaped microcrack is more likely to occur pen‐tip fracture. The growth rate of crack increases as the angle of V‐shaped microcrack increases. The action of back tension will make the drawing fracture occur earlier. Microcrack and back tension should be avoided, to reduce the risk of drawing fracture.