Cvetkov, Slavco and Kocov, Atanas (2014) Experimental analysis for defining forming limit diagram for thick sheets. Journal for Technology of Plasticity, 39 (2). pp. 47-54. ISSN 0354-3870-UDC 621.7
Preview |
Text
Trud objaven vo Technology of Plasticity, Vol. 39 (2014), N 2.pdf Download (409kB) | Preview |
Abstract
In this paper a combined procedure to determine the forming limit diagram (Keeler-Goodwin
diagram) for thick sheets is proposed. It is defined for cold rolled steel sheet Č0147 (RSt 13 DIN
17006) with thickness of 5 mm using two different criteria: maximum uniform elongation and the
criteria of tearing. For the area of one positive and one negative strain (the left part of the
diagram) the curves of limit strain are determined using the method of inline stretch of test
tubes with circular lateral clips of sheet with thickness of 5 mm. The curves of limit strain are
gained by drawing using rough hemispherical punch of sheet strips with different widths for the
same quality of the material, but with thickness of 1 mm. For the area of two positive strains (the
right part), the curves of limit strain for sheet with thickness of 5 mm are determined so that, in
continuation to the right end side of the limit curves, gained with stretching of the test tubes with
circular lateral clips, the for material with thickness of 1 mm are drawn, retaining the same form
in the process.
Key words: strain, limit deformability, diagram of limit deformability, curves of limit strain.
| Item Type: | Article |
|---|---|
| Subjects: | Engineering and Technology > Mechanical engineering |
| Divisions: | Faculty of Medical Science |
| Depositing User: | Slavco Cvetkov |
| Date Deposited: | 22 Jan 2015 14:42 |
| Last Modified: | 27 Jan 2015 08:56 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/12026 |
Actions (login required)
 |
View Item |