Loading...

Plastic Deformation Analysis of High Carbon Steel Wire During Flat Rolling

Saedi Marghmaleki, Ehsan | 2018

422 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51012 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Karimi Taheri, Ali; Kazeminezhad, Mohsen
  7. Abstract:
  8. In this research plastic deformation analysis of high carbon steel wire in one and more pass wire flat rolling process using the finite element method (FEM) has been investigated. The effects of changing rolling pass number, length of wire, mechanical property of roll, rolling speed and friction between roll and wire in calculated results have been studied and with the main process parameters are compared. Then, the damage and failure of wire and that’s steady state cross-section is examined by model of Johnson cook damage criterion (JC). The results suggested that reduction in height of the wire affects the rolling process parameters such as strain, damage and the cross-sectional geometry of wire, so that by increasing reduction, geometric parameters of wire cross section as lateral spread (difference between central width and width of contact area) are decreased, central width and width of contact area are increased. The strain parameters as equivalent plastic strain and that’s inhomogeneity factor are increased and decreased, respectively. Damage parameters as equivalent plastic strain and that’s inhomogeneity factor as same as strain parameters are increased and decreased, respectively. Also, by pass numbers of rolling process increasing, the equivalent plastic strain and that’s inhomogeneity factor have been increased and decreased, respectively. The geometric parameters of wire are reduced and Johnson cook damage parameter is a few increased. By increasing passes number, the distribution of equivalent plastic strain and Johnson cook damage parameter are the same as the results of wire cross section in simple pass rolling. In large reduction in height of wire, the effects of rolling passes number in equivalent plastic strain distribution could be neglected. In cross section of wire, by increasing the rolling pass numbers, the amounts of maximum and minimum of equivalent plastic strain are increased and decreased, respectively and damage criterion parameter domain in cross section of wire is expanded. The rate of equivalent plastic strain is increased by increasing in height reduction. Also in less reduction in height, pass numbers would not have significant effect on plastic strain, but in high reduction in height, increasing of rolling passes could affect and increase the plastic strain. With changing of rolling parameters such as the length of wire, mechanical properties of rolls, rolling speed and friction between roll(s) and wire, the distributions and average values of equivalent plastic strain, damage parameter and geometric parameters in steady state cross section of wire would be remained constant
  9. Keywords:
  10. Finite Element Analysis ; Flat Rolling ; Plastic Deformation ; High Carbon Steel ; Steel Wire Flat Rolling

 Digital Object List

 Bookmark

No TOC