An extended Modified Maximum Force Criterion for the prediction of localized necking under non-proportional loading

2015 ◽  
Vol 75 ◽  
pp. 189-203 ◽  
Author(s):  
Niko Manopulo ◽  
Pavel Hora ◽  
Philip Peters ◽  
Maysam Gorji ◽  
Frédéric Barlat
Keyword(s):  
Maximum Force ◽  
Proportional Loading ◽  
Localized Necking ◽  
Force Criterion

Assessment of the Modified Maximum Force Criterion for Aluminum Metallic Sheets

2009 ◽  
Vol 410-411 ◽  
pp. 511-520 ◽  
Author(s):  
Dorel Banabic ◽  
Stefan Soare
Keyword(s):  
Plane Strain ◽  
Failure Criterion ◽  
Maximum Force ◽  
Thin Sheets ◽  
Force Criterion ◽  
Yield Surfaces

The paper presents an analysis of a recently proposed failure criterion for thin sheets. According to Aretz [1], this criterion becomes numerically unstable for yield surfaces with locally constant exterior normal fields. Here we make more precise statements about the nature of this instability, asses the predictive capabilities of the criterion, and introduce a fitting parameter for its plane strain calibration.

scholarly journals Evaluation of Localized Necking Models for Fracture Prediction in Punch-Loaded Steel Panels

2021 ◽  
Vol 9 (2) ◽  
pp. 117
Author(s):  
Burak Can Cerik ◽  
Kangsu Lee ◽  
Joonmo Choung
Keyword(s):  
Mesh Size ◽  
Fracture Initiation ◽  
Analytical Models ◽  
Original Form ◽  
Proportional Loading ◽  
Stiffened Panels ◽  
Shell Elements ◽  
Localized Necking ◽  
Numerical Predictions ◽  
Steel Panels

This study compared the experimental test results on punch-loaded unstiffened and stiffened panels with numerical predictions using different localized necking modeling approaches with shell elements. The analytical models that were derived by Bressan–Williams–Hill (BWH) were used in their original form and extended version, which considers non-proportional loading paths while using the forming-severity concept and bending-induced suppression of through-thickness necking. The results suggest that the mesh size sensitivity depends on the punch geometry. Moreover, the inclusion of bending effects and the use of the forming-severity concept in the BWH criterion yielded improved estimations of fracture initiation with shell elements.

Predictive Performances of FLC Using Marciniak-Kuczynski Model and Modified Maximum Force Criterion

2015 ◽  
Vol 651-653 ◽  
pp. 96-101 ◽  
Author(s):  
Dorel Banabic ◽  
Lucian Lazarescu ◽  
Dan Sorin Comsa
Keyword(s):  
Theoretical Models ◽  
Alloy Sheet ◽  
Maximum Force ◽  
Forming Limit ◽  
Forming Limit Curve ◽  
Experimental Procedure ◽  
Force Criterion ◽  
Yield Functions ◽  
Theoretical Predictions ◽  
The Hill

This paper is focused on the performance evaluation of two theoretical models that can be used to predict the Forming Limit Curve (FLC) for an AA6016-T4 aluminium alloy sheet. The FLC is calculated based on the Marciniak-Kuczynski (M-K) model and the Modified Maximum Force Criterion (MMFC) using the Hill '48, Barlat '89 and BBC 2005 yield criteria, the latter identified in three variants, namely with 6, 7, and 8 material parameters. The performance assessment of the M-K and MMFC models combined with different yield functions is based on the comparison between the theoretical predictions and the experimental data provided by the Nakazima test (ISO 12004: 2008) as well as by an experimental procedure recently developed by the authors for the FLC determination.

A new formulation of the modified maximum force criterion (MMFC)

2010 ◽  
Vol 3 (S1) ◽  
pp. 243-246 ◽  
Author(s):  
Liana Paraianu ◽  
George Dragos ◽  
Ioana Bichis ◽  
Dan Sorin Comsa ◽  
Dorel Banabic
Keyword(s):  
Maximum Force ◽  
Force Criterion ◽  
New Formulation

A Study on Modified Maximum Force Criterion to Predict Forming Limit Curve of Stainless Steel Sheet

2011 ◽  
Vol 311-313 ◽  
pp. 916-921
Author(s):  
Duc Toan Nguyen ◽  
Tien Long Banh ◽  
Dong Won Jung
Keyword(s):  
Stainless Steel ◽  
Steel Sheet ◽  
Strain Ratio ◽  
Maximum Force ◽  
Forming Limit ◽  
Stainless Steel Sheet ◽  
Limit Curve ◽  
Forming Limit Curve ◽  
Hardening Law ◽  
Force Criterion

In order to predict forming limit curve for stainless steel sheet, the modified maximum force criterion (MMFC), introduced by Hora et al (1996 A prediction method for ductile sheet metal failure in FE-simulation Proc. Numisheet’96 Conf. pp 252–256), was adopted follow Swift’s hardening law. After comparing with experimental results, the improvement of MMFC model for FLD’s prediction were proposed based on Swift’s hardening law by representing work hardening coefficient as a function of strain ratio (β). The proposed MMFC model shows in good agreement between FLD’s computational and experimental result for stainless steel sheet. The results of proposed MMFC model also show that the stress-strain curves of sheets materials are difference at each strain ratio.

Sign in / Sign up

Export Citation Format

Share Document