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Title: On The Prediction Of Plastic Instability In Metal Sheets

Abstract

The current report presents some results from a study on the prediction of necking failure in ductile metal sheets. In particular methods for creating Forming Limit Curves (FLCs) are discussed in the present report. Three groups of methods are treated: Experimental methods, Theoretical/analytical methods, and the Finite Element Method (FEM). The various methods are applied to two different materials: An aluminum alloy and a high strength steel. These materials do both exhibit a distinct necking behavior before fracture, and they do both exhibit only a small strain rate dependence. As can be expected, the resulting FLCs from the various experimental, theoretical, and numerical methods show a substantial scatter. The reasons for these deviating results are analyzed, and some conclusions are drawn regarding the applicability of the different methods.

Authors:
 [1];  [2];  [3];  [4]
  1. Dept. of Applied Mechanics, Chalmers University of Technology, SE-412 96 Goeteborg (Sweden)
  2. (Sweden)
  3. Stamping CAE, Dept. 81153, Manufacturing Engineering, Volvo Cars, SE-293 80 Olofstroem (Sweden)
  4. Manufacturing Engineering - Press, C15-1 TMNKM, Saab Automobile, SE-461 80 Trollhaettan (Sweden)
Publication Date:
OSTI Identifier:
21057356
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 908; Journal Issue: 1; Conference: NUMIFORM '07: 9. international conference on numerical methods in industrial forming processes, Porto (Portugal), 17-21 Jun 2007; Other Information: DOI: 10.1063/1.2740800; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; FINITE ELEMENT METHOD; FRACTURES; MATERIALS WORKING; METALS; PLASTICITY; SHEETS; STEELS; STRAIN RATE

Citation Formats

Mattiasson, Kjell, Volvo Cars Safety Centre, Dept. 91432, SE-405 31 Goeteborg, Sigvant, Mats, and Larsson, Mats. On The Prediction Of Plastic Instability In Metal Sheets. United States: N. p., 2007. Web. doi:10.1063/1.2740800.
Mattiasson, Kjell, Volvo Cars Safety Centre, Dept. 91432, SE-405 31 Goeteborg, Sigvant, Mats, & Larsson, Mats. On The Prediction Of Plastic Instability In Metal Sheets. United States. doi:10.1063/1.2740800.
Mattiasson, Kjell, Volvo Cars Safety Centre, Dept. 91432, SE-405 31 Goeteborg, Sigvant, Mats, and Larsson, Mats. Thu . "On The Prediction Of Plastic Instability In Metal Sheets". United States. doi:10.1063/1.2740800.
@article{osti_21057356,
title = {On The Prediction Of Plastic Instability In Metal Sheets},
author = {Mattiasson, Kjell and Volvo Cars Safety Centre, Dept. 91432, SE-405 31 Goeteborg and Sigvant, Mats and Larsson, Mats},
abstractNote = {The current report presents some results from a study on the prediction of necking failure in ductile metal sheets. In particular methods for creating Forming Limit Curves (FLCs) are discussed in the present report. Three groups of methods are treated: Experimental methods, Theoretical/analytical methods, and the Finite Element Method (FEM). The various methods are applied to two different materials: An aluminum alloy and a high strength steel. These materials do both exhibit a distinct necking behavior before fracture, and they do both exhibit only a small strain rate dependence. As can be expected, the resulting FLCs from the various experimental, theoretical, and numerical methods show a substantial scatter. The reasons for these deviating results are analyzed, and some conclusions are drawn regarding the applicability of the different methods.},
doi = {10.1063/1.2740800},
journal = {AIP Conference Proceedings},
number = 1,
volume = 908,
place = {United States},
year = {Thu May 17 00:00:00 EDT 2007},
month = {Thu May 17 00:00:00 EDT 2007}
}