Results 261 to 270 of about 71,625 (304)

Prediction of the forming limit diagrams in pulsatory straining

Journal of Materials Processing Technology, 1994
The influence of the pulsatory straining upon the formability of the steel sheets is investigated both theoretical and experimental. The left-hand side of the FLDs was calculated using a Hutchinson-Neale (H-N) analysis. Effects of changing the strain-hardening coefficient, n, strain-rate coefficient, m, anisotropy coefficients, r0, r45 and r90 and ...
D. Banabic, I.R. Dörr
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Prediction of Forming Limit Diagram with Damage Analysis

SAE Technical Paper Series, 1996
<div class="htmlview paragraph">Based on the theory of damage mechanics, an orthotropic damage model for the prediction of forming limit diagram (FLD) is developed. The conventional method of FLD used to predict localized necking adopts two fundamentally different approaches.
C. L. Chow, L. G. Yu, M. Y. Demeri
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Determination of warm forming limit diagram for ZEK100

AIP Conference Proceedings, 2013
The formability of a rare-earth alloyed magnesium sheet, ZEK100, is studied through determination of its Forming Limit Diagram (FLD). Limiting dome height experiments were performed at elevated temperatures with in situ digital image correlation (DIC) measurement of strain.
Nima Panahi, Michael Worswick, Tim Skszek   +2 more
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Analyses of the Forming Limit Diagram in Digital Environment

Advanced Materials Research, 2005
The determination of the forming limit diagrams (FLDs) for sheet metal can be influenced by testing parameters and a chosen testing procedure. Many different tests have been applied and recent work has resulted in some guidelines to decrease the influence of the testing method and the expertise of an individual laboratory.
Tomaz Pepelnjak, Ales Petek, Karl Kuzman
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A theoretical study on forming limit diagrams prediction

Journal of Materials Processing Technology, 2003
Abstract The paper develops a theoretical study on forming limit diagrams using a new general code for forming limit strains prediction. Treating the Marciniak and Kuckzinsky (M–K) theory by a new approach, the code consists of the main part and several subroutines, which allow the implementation of any hardening law, yield function or constitutive ...
M.C. Butuc, J.J. Gracio, A. Barata da Rocha   +2 more
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Anisotropic fracture forming limit diagram considering non-directionality of the equi-biaxial fracture strain

International Journal of Solids and Structures, 2018
This paper is concerned with modeling of anisotropic fracture forming limit diagram considering non. -directionality of the equi. -biaxial fracture strain.
Namsu Park, Hoon Huh, Jeong Whan Yoon
exaly   +1 more source

Limitations of the M-K Based Forming Limit Diagrams

2012
Using a rate dependent Taylor type crystal plasticity formulation, the limitations of Marciniak-Kuczynski (M-K) approach to numerically simulate the Forming Limit Diagrams (FLDs) were studied. Three uniaxial stress-strain curves with three different post-necking hardening behaviors were generated using crystal plasticity formulation.
Mohsen Mohammadi, Kaan Inal, Raja k. Mishra   +2 more
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Predicting of plastic instability and forming limit diagrams

International Journal of Mechanical Sciences, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Aghaie-Khafri, M., Mahmudi, R.
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Forming limit diagrams

2004
In this work, the Marciniak and Kuczynski model (MK) will be reviewed and will be generalized to a more general approach for the calculation of forming limit diagrams. In the new model we will account for all directions of the imperfection. This new approach has been used to calculate the theoretical FLDs (forming limit diagrams) for Vonmises, Barlat ...
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Time dependent determination of forming limit diagrams

CIRP Annals, 2010
Abstract The forming limit diagram (FLD) is a convenient tool for classification of sheet metals’ formability in the finite element analysis as well as in the press shop. The FLD indicates the maximum strain values which can be applied on a material without failure as a function of the strain condition.
M. Merklein, A. Kuppert, M. Geiger
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