Finite Element Analysis and Experimental Investigation of Sheet Metal Stretching

1973 ◽  
Vol 95 (3) ◽  
pp. 874-880 ◽  
Author(s):  
H. S. Mehta ◽  
S. Kobayashi
Keyword(s):  
Finite Element Method ◽  
Experimental Investigation ◽  
Finite Element ◽  
Sheet Metal ◽  
Excellent Agreement ◽  
Effective Strain ◽  
Deformation Pattern ◽  
The Finite Element Method ◽  
Flat Punch ◽  
Element Method

The finite element method was used to obtain the stress and strain distributions in sheet metal on nonaxisymmetric flat punch heads in stretching. Displacement boundary conditions were assumed. The experimental investigation was carried out by stretching securely clamped grid blanks with suitable punch heads; boundary displacements and strains were obtained from the observed deformation pattern on punch heads. A comparison with an experiment in terms of effective strain and thickness strain distributions and strains along the longitudinal axis reveals excellent agreement. The finite element method was also applied to bore expanding in a circular plate. Strain distributions were obtained for two types of materials, one isotropic and the other material having thickness anisotropy. The results showed excellent agreement with exact solution and experimental results.

A Study on the Development of Tool Planning for REF SILL OTR-R/L Auto-Body Panel by Using Forming Analysis

2012 ◽  
Vol 628 ◽  
pp. 461-468
Author(s):  
D.W. Jung ◽  
D.H. Kim ◽  
B.C. Kim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Sheet Metal ◽  
Deformation Behaviour ◽  
Good Prediction ◽  
The Finite Element Method ◽  
Forming Analysis ◽  
Auto Body ◽  
Body Panel ◽  
Element Method

The characteristics of the sheet metal process include the loss of material during the process, short processing time and excellent price and strength. The sheet metal process with the above characteristics is commonly used in the industrial field, but in order to analyze irregular field problems, a reliable and economical analysis method are needed. The finite element method is a very effective method to simulate the forming processes with a good prediction of the deformation behaviour. Among the finite element method, the static-implicit finite element method is applied effectively in order to analyze the real-size auto-body panel stamping processes, which include the forming stage.

Finite Element Analysis of a Steel Bracket

2014 ◽  
Vol 1061-1062 ◽  
pp. 584-587
Author(s):  
Xiao Liang Chen ◽  
Zuan Tian ◽  
Yuan Ping Li
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Sheet Metal ◽  
Theoretical Method ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Stress And Deformation ◽  
Element Method

With the development of the society, sheet metal filing cabinets have become popular in the office. When filing cabinets store too many paper documents, the interlayer splints often fail because of the failure of the small brackets below. The stress and deformation of brackets were studied by the theoretical method and the finite element method. Results show some small machining shape defects have little influence on the mechanical behavior of brackets. The failure reason of small brackets is not the strength, but the instability.

scholarly journals Cold stamping of a cartridge case blank for 40x53 mm caliber grenade launcher ammunition

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
Mikhailo Orlyuk ◽  
Pimanov Pimanov ◽  
Vitaliy Zhukov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Computer Modeling ◽  
Rational Method ◽  
Cold Extrusion ◽  
Deformation Pattern ◽  
The Finite Element Method ◽  
Research Results ◽  
Cartridge Case ◽  
Element Method

Problems. The choice of a rational method for stamping blanks with two hollows is usually carried out according to the permissible degree of deformation, the coefficient of material utilization, and the productivity of the process without taking into account the effect of the deformation pattern on the final mechanical properties of the stamped semi-finished product. Purpose of the study. Determination of a rational method for stamping a blank of a 40x53 mm grenade launcher cartridge case based on the results of computer modeling using the finite element method. Cartridge case material - AD35 aluminum alloy. The workpiece has two hollows with different diameters and depths. Implementation technique. By means of computer modeling using the finite element method, two options for stamping of a workpiece are researched - double-sided extrusion and sequential reverse extrusion with tilting of the workpiece. Research results. Based on the results of the research, the features of deformation according to the given schemes, as well as the energy-force parameters and parameters of the stress-strain state of the processes, are determined. It has been established that both methods make it possible to obtain blanks with specified geometric dimensions. At the same time, sequential back extrusion provides a more uniform and predictable deformation of the material along the cross-section of the workpiece, but loses in productivity to double-sided extrusion. Conclusions. The obtained research results can be used as criteria when choosing the optimal option for stamping of a workpiece with two hollows by cold extrusion.

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