A Thermomechanical Modeling and Simulation of Viscoplastic Large Deformation Behavior for Polymeric Materials. 2nd Report, Vertex Model Based on Flow Rule and Its Finite Element Analysis.

A computational technique of rigid-plastic finite element method by using the Eulerian meshing method was developed to deal with large deformation problem in metal forming by replacing the conventional way of applying complicated remeshing schemes when using the Lagrange’s elements. During metal forming process, a workpiece normally undergoes large deformation and causes severe distortion of elements in finite element analysis. The distorted element may lead to instability in numerical calculation and divergence of non-linear solution in finite element analysis. With Eulerian elements, the initial elements are generated to fix into a specified analytical region with particles implanted as markers to form the body of a workpiece. The particles are allowed to flow between the elements after each deformation step to show the deforming pattern of material. Four types of cold forging and sheet metal clinching were conducted to investigate the effectiveness of the presented method. The proposed method is found to be effective by comparing the results on dimension of the final product, material flow behaviour and punch load versus stroke obtained from simulation and experiment.

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Finite Element Analysis about Effects of Particle Size on Deformation Behavior of Particle Reinforced Metal Matrix Composites

Key Engineering Materials - Progresses in Fracture and Strength of Materials and Structures ◽

10.4028/0-87849-456-1.1263 ◽

2007 ◽

pp. 1263-1266

Author(s):

Yi Wu Yan ◽

Lin Geng ◽

Ai Bin Li ◽

Guo Hua Fan

Keyword(s):

Finite Element Analysis ◽

Particle Size ◽

Finite Element ◽

Metal Matrix Composites ◽

Deformation Behavior ◽

Metal Matrix ◽

Matrix Composites ◽

Element Analysis

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Dislocation density-based finite element analysis of large strain deformation behavior of copper under high-pressure torsion

Acta Materialia ◽

10.1016/j.actamat.2014.05.027 ◽

2014 ◽

Vol 76 ◽

pp. 281-293 ◽

Cited By ~ 78

Author(s):

Dong Jun Lee ◽

Eun Yoo Yoon ◽

Dong-Hyun Ahn ◽

Byung Ho Park ◽

Hyo Wook Park ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

High Pressure ◽

Dislocation Density ◽

Deformation Behavior ◽

High Pressure Torsion ◽

Large Strain ◽

Element Analysis

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FINITE ELEMENT ANALYSIS OF CONSTRAINED GROOVE PRESSING OF PURE ALUMINUM SHEETS

International Journal of Computational Materials Science and Engineering ◽

10.1142/s2047684113500012 ◽

2013 ◽

Vol 02 (01) ◽

pp. 1350001 ◽

Cited By ~ 1

Author(s):

S. S. SATHEESH KUMAR ◽

I. BALASUNDAR ◽

T. RAGHU

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Plastic Strain ◽

Deformation Behavior ◽

Strain Distribution ◽

Pure Aluminum ◽

Detailed Examination ◽

Deformation Characteristics ◽

Element Analysis ◽

Aluminum Sheets

Constrained groove pressing (CGP) is an attractive severe plastic deformation technique capable of processing ultrafine grained/nanostructured sheet materials. The deformation behavior of pure aluminum during constrained groove pressing is investigated by carrying out a two-dimensional finite element analysis (FEA). FEA predicted deformation behavior observed during each stages of pressing indicated almost negligible deformation in flat regions, whereas the inclined shear regions revealed diverse deformation characteristics. The plastic strain distributions unveiled inhomogeneous strain distribution at the end of one pass. Detailed examination of plastic strain evolution during CGP along various sections divulged superior strain distribution along middle surfaces when compared to top and bottom surfaces. The degree of strain homogeneity is evaluated quantitatively along different regions of the sheet and is correlated to the deformation characteristics. Load–stroke characteristics obtained during corrugating and flattening of sheets exhibited three stages and two stages behavior, respectively. The results obtained from the analysis are experimentally validated by processing pure aluminum sheets by CGP and the measured deformation homogeneity is benchmarked with FEA results.

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