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Journal of Materials Processing Technology, 2007
Abstract The strain-based forming limit diagram (FLD) is generally obtained on the linear (proportional) or near linear loading condition. So it often leads to erroneous assessments on the analysis of metal sheet formability under complex strain paths such as multi-step forming by the FLD criterion.
M H Chen
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Abstract The strain-based forming limit diagram (FLD) is generally obtained on the linear (proportional) or near linear loading condition. So it often leads to erroneous assessments on the analysis of metal sheet formability under complex strain paths such as multi-step forming by the FLD criterion.
M H Chen
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Journal of Strain Analysis for Engineering Design, 2017 Forming limit diagram is one of the most commonly used failure criteria for sheet metal forming analysis. Forming limit diagram generation is time-consuming, and therefore, any reduction in the test requirements will be useful for the industry.
Abhishek Raj, Rahul K Verma
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Calculation of the forming limit diagram
Metallurgical Transactions A, 1989A mathematical model is presented to help understand sheet metal deformation during forming. The particular purpose of this model is to predict the forming limit diagram (FLD). The present model is an extension of a previous analysis by Jones and Gillis (JG)[1] in which the deformation is idealized into three phases: (I) homogeneous deformation up to ...
Wonjib Choi +2 more
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Calculations of forming limit diagrams
Metallurgical Transactions A, 1990The right-hand side of the forming limit diagram (FLD) was calculated using a Marciniak-Kuczynski analysis with a nonquadratic anisotropic yield criterion. Effects of changing the strain-hardening exponent, n, strain-rate exponent, m, strain ratio, R, stress exponent in the anisotropic yield criterion, a, and the inhomogeneity factor, f, were explored.
Alejandro Graf, William F. Hosford
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On forming limit stress diagram analysis
International Journal of Solids and Structures, 2005zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wu, P. D. +5 more
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Stochastic simulations of forming limit diagrams
AIP Conference Proceedings, 2007Finite element simulations of square patches of material with spatial thickness variations subjected to a set of proportional strain paths have been performed. Localization is detected when the thickness increment in one element is much larger then the average thickness increment of the whole patch.
O. Fyllingen +2 more
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The bending dependency of forming limit diagrams
International Journal of Material Forming, 2018The forming limit diagram (FLD) is commonly used in the forming industry to predict localized necking in sheet metals. However, experimental and mathematical determination of forming limit curves is based on in-plane deformation without taking a bending component into account.
Felix M. Neuhauser +4 more
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Forming limit diagrams: a micromechanical approach
International Journal of Mechanical Sciences, 2000zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gänser, Hans Peter +2 more
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Torsional Softening and the Forming Limit Diagram
SAE Technical Paper Series, 1996<div class="htmlview paragraph">Torsional softening arising from the deformation-induced anisotropy of texture and dislocation substructure formation affects various regions of the forming limit diagram. The third invariant of overstress, <img class="article-image inline" src="960599_fig0001.jpg" alt=""/> is included in the kinematic and ...
Mark F. Horstemeyer +2 more
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Forming limit diagram of perforated sheet
Scripta Metallurgica et Materialia, 1995The proper design and manufacture of tube sheets in heat exchangers and shadow masks in color picture tubes require the characterization of the deformation behavior of perforated sheets containing a large number of holes. The limit or failure strains in sheet metal forming are best represented by a forming limit curve (FLC) which indicates the onset of
Seung Chul Baik +2 more
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