Finite element correction matrices in metal forming analysis (with application to hydrostatic bulging of a circular sheet)

1982 ◽  
Vol 24 (7) ◽  
pp. 393-406 ◽  
Author(s):  
Abdalla S. Wifi
Keyword(s):  
Finite Element ◽  
Metal Forming ◽  
Forming Analysis

NUMERICAL SIMULATION OF BULK METAL FORMING BY MESHLESS METHOD

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1615-1620 ◽  
Author(s):  
HONGSHENG LIU ◽  
ZHONGWEN XING
Keyword(s):  
Finite Element ◽  
Metal Forming ◽  
Meshless Method ◽  
Reproducing Kernel ◽  
Shape Function ◽  
Forming Process ◽  
Bulk Metal ◽  
Bulk Metal Forming ◽  
Structural Applications ◽  
Forming Analysis

Conventional finite element (FE) analysis of bulk metal forming processes often breaks down due to severe mesh distortion. In recent years, meshless methods have been considerably developed for structural applications. The main feature of these methods is that the problem domain is represented by a set of nodes, and a finite element mesh is unnecessary. This new generation of computational methods can avoid time-consuming meshing and remeshing. A meshless method based on reproducing kernel particle method (RKPM) is applied to bulk metal forming analysis. The displacement shape functions are developed from a reproducing kernel (RK) approximation that satisfies consistency conditions. The shape function is modified to impose essential boundary conditions accurately and expediently. A material kernel function that deforms with the material is introduced to assure the stability of the RKPM shape function during large deformations. A program based on RKPM is developed to simulate two examples of bulk metal forming process such as ring compression and cold upsetting, and numerical results demonstrate the performance of the meshless method in bulk metal forming analysis.

Forming Analysis of Housing with Small Fillets

2011 ◽  
Vol 80-81 ◽  
pp. 601-605
Author(s):  
Peng Yuan ◽  
Han Guan Xia ◽  
Xin Cun Zhuang ◽  
Hong Jun Zhao ◽  
Yi Dong ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Metal Forming ◽  
Dimensional Accuracy ◽  
Housing Production ◽  
Bulk Metal ◽  
Bulk Metal Forming ◽  
Process Sequence ◽  
Element Simulation ◽  
Forming Analysis

In order to ensure the dimensional accuracy of housing with small fillets, various forming factors have been analyzed in this paper based on finite element simulation. Through the analysis of the forming factors, the principle of die angle selection, the proper reverse drawing height in sizing process, sequence of sizing and applications of local sheet bulk metal forming in housing production were put forward, and some forming laws of housing with small fillets were concluded.

Sheet Forming Analysis Based on Improved Contact Searching Algorithm and Simple Approach for Contact Force Evaluation

2000 ◽  
Vol 123 (1) ◽  
pp. 119-124 ◽  
Author(s):  
G. Y. Li ◽  
M. J. Tan ◽  
K. M. Liew ◽  
Z. H. Zhong
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Contact Force ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Sheet Forming ◽  
Simple Approach ◽  
Explicit Finite Element ◽  
Novel Approach ◽  
Forming Analysis

Explicit finite element procedures for the simulation of sheet-metal-forming processes are reviewed. Improved techniques for contact searching and contact force evaluation are then proposed and discussed. In the contact searching algorithm, a new contact territory definition is introduced and only node-to-segment contact pairs are defined, which makes the post-contact searching more efficient and easy to implement. For contact force evaluation, a novel approach is employed to make the simulation of sheet forming processes more accurate. The algorithms are implemented and examined via experiments.

Finite Element Analysis of Metal Forming Processes on Personal Computers

1991 ◽  
Vol 113 (4) ◽  
pp. 441-445 ◽  
Author(s):  
Li-lai Yan ◽  
Song-qing Xu ◽  
Guo-ji Li
Keyword(s):  
Finite Element ◽  
Metal Forming ◽  
Industrial Applications ◽  
Rigid Plastic ◽  
Element Analysis ◽  
Finite Element Program ◽  
Forming Analysis ◽  
Element Program ◽  
Linear Problems ◽  
Shape Complexity

The main difficulty in running a rigid-plastic finite element program for metal forming analysis on a personal computer lies in the lengthy computation, typical of non-linear problems. To make the PC more acceptable for forming analyses in industrial applications, some measures have been proposed, such as using a higher order IVP solver and modifying the generation of the initial velocity field to account for the existence of rigid zones, if any. As a result, 2-D metal forming problems with moderate shape complexity can be solved on PCs within a reasonable length of time.

Development of a Friction Element for Metal Forming Analysis

1982 ◽  
Vol 104 (3) ◽  
pp. 253-256 ◽  
Author(s):  
W. D. Webster ◽  
R. L. Davis
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Metal Forming ◽  
Three Dimensional ◽  
Friction Element ◽  
Forward Extrusion ◽  
Dimensional Finite Element ◽  
Forming Analysis ◽  
Three Dimensional Finite Element

A three-dimensional finite element friction element has been developed. The friction element has been used in the analysis of round-to-square forward extrusion. Comparison with some limited experimental data is presented.

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