Forming limit diagram analysis based on crystal plasticity for magnesium alloy sheets

2013 ◽  
Author(s):  
Weiqin Tang ◽  
Dayong Li ◽  
Yinghong Peng ◽  
Shaorui Zhang
Keyword(s):  
Magnesium Alloy ◽  
Crystal Plasticity ◽  
Forming Limit Diagram ◽  
Forming Limit ◽  
Diagram Analysis

scholarly journals Crystal plasticity forming limit diagram analysis of rolled aluminum sheets

1998 ◽  
Vol 29 (2) ◽  
pp. 527-535 ◽  
Author(s):  
P. D. Wu ◽  
K. W. Neale ◽  
E. Van Der Giessen ◽  
M. Jain ◽  
S. R. MacEwen ◽  
...  
Keyword(s):  
Crystal Plasticity ◽  
Forming Limit Diagram ◽  
Forming Limit ◽  
Aluminum Sheets ◽  
Rolled Aluminum ◽  
Diagram Analysis

Forming limit analysis of Mg-2Zn-1.2Al-0.2Ca-0.2RE alloy sheet using ductile fracture models

2019 ◽  
Vol 29 (8) ◽  
pp. 1181-1198 ◽  
Author(s):  
Fei-Fan Li ◽  
Gang Fang ◽  
Ling-Yun Qian
Keyword(s):  
Magnesium Alloy ◽  
Ductile Fracture ◽  
Stress Triaxiality ◽  
Forming Limit Diagram ◽  
Alloy Sheet ◽  
Image Correlation ◽  
Forming Limit ◽  
Correlation Technique ◽  
Forming Limits ◽  
Fracture Models

This work was aimed to experimentally and theoretically investigate the formability of a new magnesium alloy sheet at room temperature. The fracture forming limit diagram was predicted by MMC3 and DF2014 models, where the non-linear strain path effect was taken into account by means of damage accumulation law. In order to obtain the instantaneous values of the stress triaxiality and the Lode parameter during the deformation process, strains tracked by digital image correlation technique were transformed into stresses based on the constitutive equations. The fracture forming limit diagram predicted by the fracture models was compared with the forming limits obtained by ball punch deformation tests. The prediction errors were evaluated by the accumulative damage values, which verified the advantages of ductile fracture models in predicting the forming limits of the magnesium alloy sheets.

1006 Effects of Temperature and Strain-Rate on Non-proportion Forming Limit Diagram for AZ31 Magnesium Alloy Sheets

2009 ◽  
Vol 2009.47 (0) ◽  
pp. 337-338
Author(s):  
Yosuke UEKAWA ◽  
Takashi KATAHIRA ◽  
Akiyoshi ODE ◽  
Testuo NAKA ◽  
Takeshi UEMORI ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Strain Rate ◽  
Forming Limit Diagram ◽  
Az31 Magnesium Alloy ◽  
Forming Limit ◽  
Effects Of Temperature

Forming Limit Diagram Predictions Using a Self-Consistent Crystal Plasticity Model: A Parametric Study

2015 ◽  
Vol 651-653 ◽  
pp. 193-198 ◽  
Author(s):  
Youngung Jeong ◽  
Minh Son Pham ◽  
Mark Iadicola ◽  
Adam Creuziger
Keyword(s):  
Crystal Plasticity ◽  
Current Model ◽  
Computation Time ◽  
Forming Limit Diagram ◽  
Forming Limit ◽  
Plasticity Model ◽  
Statistical Population ◽  
Crystal Plasticity Model ◽  
Self Consistent ◽  
Sensitivity Report

A numerical model to predict forming limit diagrams (FLD) for polycrystalline metal sheets is presented. In it, the Marciniak-Kuczynski (MK) approach is incorporated into the framework of the viscoplastic self-consistent (VPSC) crystal plasticity model. The current model, dubbed the VPSC-FLD, can run simulations along individual loading paths in parallel, which can make use of a CPU-cluster to enhance the computational speed. The main objective of the current work is to provide a detailed sensitivity report based on the VPSC-FLD. First of all, the influence of the initial inhomogeneity, f , as defined in the MK approach, is illustrated. Secondly, FLDs resulting from various sizes of the statistical population for the crystallographic texture are examined. Lastly, the computation time spent for various sizes of the statistical population is given.

Forming Limit Prediction of BCC Materials under Non-Proportional Strain-Path by Using Crystal Plasticity

2012 ◽  
Vol 201-202 ◽  
pp. 1110-1116
Author(s):  
Mei Yang ◽  
Xiao Yan Zhang ◽  
Hao Wang
Keyword(s):  
Sheet Metal ◽  
Crystal Plasticity ◽  
Strain Path ◽  
Forming Limit Diagram ◽  
Forming Limit ◽  
Slip Systems ◽  
Plasticity Model ◽  
Forming Process ◽  
Crystal Plasticity Model ◽  
Microstructure Effect

In this paper, the forming limit of a body-centered cubic (BCC) sheet metal under non-proportional strain-path is investigated by using the Marciniak and Kuczynski approach integrated with a rate-dependent crystal plasticity model. The prediction model has been proved to be effective in predicting Forming Limit Diagram (FLD) of anisotropic sheet metal with FCC type of slip systems[1]. The same model has been used to study the FLD under non-proportional strain-path of BCC slip systems numerically and experimentally. The agreement between the experiments and simulations is good. With crystal plasticity model well describing the crystal microstructure effect, our model can be used to predict the FLD of BCC sheet metal under complicated strain path in plastic forming process with good accuracy.

An innovation in finite element simulation via crystal plasticity assessment of grain morphology effect on sheet metal formability

2021 ◽  
pp. 146442072110246
Author(s):  
Mostafa Habibi ◽  
Roya Darabi ◽  
Jose C de Sa ◽  
Ana Reis
Keyword(s):  
Finite Element ◽  
Tensile Test ◽  
Crystal Plasticity ◽  
Forming Limit Diagram ◽  
Material Behavior ◽  
Forming Limit ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Polycrystal Plasticity ◽  
Grain Distribution

Experimental and numerical study regarding the uniaxial tensile test and the forming limit diagram are addressed in this paper for AL2024 with the face-centered cube structure. First, representation of a grain structure can be obtained directly by mapping metallographic observations via scanning electron microscopy approach. Artificial grain microstructures produced by Voronoi Tessellation method are employed in the model using VGRAIN software. By resorting to the finite element software (ABAQUS) capabilities, the constitutive equations of the crystal plasticity were utilized and implemented as a user subroutine material UMAT code. The hardening parameters were calibrated by a trial and error approach in order to fit experimental tensile results with the simulation. Then the effect of the changing grain size, the heterogeneity factor, and the grain aspect ratio were studied for a uniaxial tensile test to emphasize the importance of the microstudy behavior of grains in material behavior. Furthermore, the polycrystal plasticity grain distribution was employed in the Nakazima test in order to obtain the forming limit diagram. The crystal plasticity-driven forming limit diagram reveals more accurate strains, taking into account the involving the micromechanical features of the grains. An innovative approach is pursued in this study to discover the necking angle, both in tensile test or Nakazima samples, showing a good agreement with the experiment results.

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