دورية أكاديمية
Investigation of Notch-Induced Precise Splitting of Different Bar Materials under High-Speed Load
| العنوان: | Investigation of Notch-Induced Precise Splitting of Different Bar Materials under High-Speed Load |
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| المؤلفون: | Yuanzhe Dong, Yujian Ren, Shuqin Fan, Yongfei Wang, Shengdun Zhao |
| المصدر: | Materials, Vol 13, Iss 11, p 2461 (2020) |
| بيانات النشر: | MDPI AG, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Technology LCC:Electrical engineering. Electronics. Nuclear engineering LCC:Engineering (General). Civil engineering (General) LCC:Microscopy LCC:Descriptive and experimental mechanics |
| مصطلحات موضوعية: | metal bar, precise cropping, circumferential notch, high-speed, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85 |
| الوصف: | A notch-induced high-speed splitting method was developed for high-quality cropping of metal bars using a new type of electric-pneumatic counter hammer. Theoretical equations and FE models were established to reveal the crack initiation and fracture mode. Comparative tests were conducted for notched and unnotched bars of four types of steels, i.e., AISI 1020, 1045, 52100, and 304, and the section quality and microfracture mechanism were further investigated. The results show that damage initiates at the bilateral notch tips with peak equivalent plastic strain, and propagates through the plane induced by the notch tip; the stress triaxiality varies as a quasi-sine curve, revealing that the material is subjected to pure shearing at the notch tip, and under compression at the adjacent region. High precision chamfered billets were obtained with roundness errors of 1.1–2.8%, bending deflections of 0.5–1.5mm, and angles of inclination of 0.7°–3.4°. Additionally, the notch effectively reduced the maximum impact force by 21.6–23.9%, splitting displacement by 7.6–18.6%, and impact energy by 27.8–39.1%. The crack initiation zone displayed quasi-parabolic shallow dimples due to shear stress, and the pinning effect was larger in AISI 52100 and 1045 steel; the final rupture zone was characterized by less elongated and quasi-equiaxial deeper dimples due to the combination of shear and normal stress. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1996-1944 51072807 |
| Relation: | https://www.mdpi.com/1996-1944/13/11/2461; https://doaj.org/toc/1996-1944 |
| DOI: | 10.3390/ma13112461 |
| URL الوصول: | https://doaj.org/article/c7e787cc63bf4d37a510728070642cd7 |
| رقم الأكسشن: | edsdoj.7e787cc63bf4d37a510728070642cd7 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19961944 51072807 |
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| DOI: | 10.3390/ma13112461 |