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Nova metoda za določevanje krivulje mejnih deformacij v digitalnem okolju
Petek, Aleš (Author), Pepelnjak, Tomaž (Author), Kuzman, Karl (Author)

URLURL - Presentation file, Visit http://www.dlib.si/details/URN:NBN:SI:doc-8CD2B621 New window

Abstract
Deformacijske meje pločevine, opredeljene z lokalizacijo in trganjem materiala, so pomemben parameter pri analizi preoblikovalnih postopkov. Meje dopustnih deformacij pločevine pri različnih deformacijskih stanjih najbolje prikazemo v diagramu mejnih deformacij. Za preizkusno določitev diagrama so potrebni obsezni in dragi preizkusi. Alternativna metoda za določitev krivuljemejnih deformacij (KMD) je analiza trganja materiala z numeričnimi simulacijami. V prispevku je predstavljena metoda določevanja krivulje mejnih deformacij za celotno področje. Z uporabo programskega paketa ABAQUS je bila izvedena simulacija MKE po Marciniaku preizkusa vroče cinkane jeklene pločevine. Opisan je kriterij za določitev KMD z numerično simulacijo in na koncu se primerjava numerično in preizkusno dobljene KMD.

Language:Slovenian
Work type:Not categorized (r6)
Tipology:1.02 - Review Article
Organization:FS - Faculty of Mechanical Engineering
Year:2005
Publisher:Association of Mechanical Engineers and Technicians of Slovenia et al.
Number of pages:str. 330-345
Numbering:Letn. 51, št. 6
UDC:621.98.04:539.375
ISSN on article:0039-2480
COBISS.SI-ID:8412443 Link is opened in a new window
Views:523
Downloads:100
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [et al.], = Association of Mechanical Engineers and Technicians of Slovenia [et al.]
ISSN:0039-2480
COBISS.SI-ID:762116 New window

Secondary language

Language:English
Title:An improved method for determining a forming limit diagram in the digital environment
Abstract:
The deformation limits of sheet metals, which are determined with localizationand fracture, represent an important parameter for the analyses ofsheet-metal forming processes. The forming limits of sheet metal are represented by a forming limit diagram (FLD), which shows the various deformation states. For an experimental determination of a FLD extensive and expensive tests are necessary. An alternative method for determining the forming limit curve (FLC) is an analysis performed using numerical simulations. This paper introduces a method for determining the forming limit curve for the whole range of the FLD for sheet metal. A simulation of the Marciniak test with the finite element method (FEM) was performed for hot-galvanized steel using the ABAQUS program. The criterion for determining the FLD with a numerical simulation is presented. Finally, the numerically obtained forming limit curve is compared with an experimental curve.

Keywords:sheet metal forming, forming limit curves, finite element methods, numerical simulations

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