| تعداد نشریات | 24 |
| تعداد شمارهها | 877 |
| تعداد مقالات | 7,848 |
| تعداد مشاهده مقاله | 14,549,267 |
| تعداد دریافت فایل اصل مقاله | 12,277,157 |
The Relationship between Constant Friction Factor and Coefficient of Friction in Metal Forming using Finite Element Analysis | ||
| Iranian Journal of Materials Forming | ||
| مقاله 2، دوره 1، Issue 2، دی 2014، صفحه 14-22 اصل مقاله (404.69 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijmf.2014.2290 | ||
| نویسندگان | ||
| Sh. Molaei1؛ M. Shahbaz1؛ R. Ebrahimi* 2 | ||
| 1Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran. | ||
| 2Department of Materials Science and Engineering, School of Engineering, Shiraz University, Iran. | ||
| چکیده | ||
| Frictional shear stress is usually determined by utilizing the coefficient of friction or the constant friction factor models. The present study deals with finite element analysis of double cup extrusion process to determine the relationship between constant friction factor (m) and coefficient of friction (µ), since the metal flow in this process is very sensitive to frictional conditions. Therefore, the Finite Element-Code Deform 2D is used which is capable of utilizing both µ and m. According to this analysis a new equation between constant friction factor (m) and coefficient of friction (µ) is suggested. Moreover, in order to evaluate the suggested equation and to compare it with the pervious relationship, finite element analysis of barrel-compression test is carried out. Finite element results indicate that the new equation can accurately predict the relation between m and its equivalent μ value. The importance of converting these factors to each other is specially highlighted to introduce the frictional conditions in some professional and commercial finite element softwares. | ||
| کلیدواژهها | ||
| Metal Forming؛ Friction Coefficient؛ Constant Friction Factor؛ Finite Element Analysis | ||
| مراجع | ||
|
[1] J. A. Schey, Tribology in Metalworking: Friction, Lubrication and Wear, American Society for Metals, The United States, (1983). [2] E. Siebel, Resistance and deformation and the flow material during rolling, Stahl und Eisen, 50 (1930) 1769– 1775. [3] Th. Von Karman, on the theory of rolling, Zeitschrift für Angewandte Mathematik und Mechanik, 5 (1925) 139– 141. [4] X. Tan, Comparisons of friction models in bulk metal forming, Tribology International, 35 (2002) 385–393. [5] R. Geiger, Metal Flow in Combined Can Extrusion, Reports from the Institute for Forming Technology of the University Stuttgart Nr. 36, Girardet Essen Germany, (1976). [6] K. Manisekar and R. Narayanasamy, Phenomenon of barreling in square billets of aluminium during cold upset forging, International Journal Advanced Manufacturing Technology, 21 (2003) 84–90. [7] S. Malayappan and R. Narayanasamy, An experimental analysis of upset forging of aluminium cylindrical billets considering the dissimilar frictional conditions at flat die surfaces, International Journal Advanced Manufacturing Technology, 23 (2004) 636–643. [8] S. Malayappan and G. Esakkimuthu, Barreling of aluminium solid cylinders during cold upsetting with differential frictional conditions at the faces, International Journal Advanced Manufacturing Technology, 29 (2006) 41–48. [9] M. Kunogi, Reports of the Scientific Research Institute, Tokyo, 30 (1954) 63. [10] N. Bay, The state of the art in cold forging lubrication, Journal of Materials Processing Technology, 46 (1994) 19–40. [11] L. Wang, J. Zhou, J. Duszczyk and L. Katgerman, Friction in aluminium extrusion—Part 1: A review of friction testing techniques for aluminium extrusion, Tribology International, 56 (2012) 89–98. [12] R. Ebrahimi and A. Najafizadeh, A new method for evaluation of friction in bulk metal forming, Journal of Materials Processing Technology, 152 (2004) 136–143. [13]K. Manisekar and R. Narayanasamy, Effect of friction on barreling in square and rectangular billets of aluminum during cold upset forging, Materials & Design, 28 (2007) 592–598. [14]Sh. Koayashi, Soo-IK Oh and T. Altan, Metal Forming and the Finite-Element Method, Oxford Series on Advanced Manufacturing, (1989). [15]N. Bay, Friction stress and normal stress in bulk metal forming processes, Journal of Mechanical Working Technology, 14 (1987) 203–223. [16]K. P. Rao and K. Sivaram, A review of ring-compression testing and applicability of the calibration curves, Journal of Materials Processing Technology, 37 (1993) 295–318. [17]DEFORM-2D V9.0., Scientific Forming Technologies Corporation (SFTC). [18]N. Pardis and R. Ebrahimi, Deformation behavior in simple shear extrusion (SSE) as a new severe plastic deformation technique, Materials Science and Engineering A, 527 (2009) 355–360. [19]M. L. Ghobrial, J. Y. Lee, T. Altan, N. Bay and B. G. Hansen, Factors affecting the double cup extrusion test for evaluation of friction in cold and warm forging, CIRP Annals - Manufacturing Technology, 42 (1993) 347-351. [20]A. Buschhausen, K. Weinmann, J. Y. Lee and T. Altan, Evaluation of lubrication and friction in cold forging using a double backward extrusion process, Journal of Materials Processing Technology, 33 (1992) 95–108. [21] T. Schrader, M. Shirgaokar and T. Altan, A critical evaluation of the double cup extrusion test for selection of cold forging lubricants, Journal of Materials Processing Technology, 189 (2007) 36–44. | ||
|
آمار تعداد مشاهده مقاله: 10,851 تعداد دریافت فایل اصل مقاله: 3,663 |
||