Anisotropic Sheet Drawing

Estimated Time for Completion: 10 minutesExperience Level: Higher

MSC.Marc 2005r2MSC.Patran 2005r2

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Topics Covered

• 2D thick shell elements with reduced integration

• 1D spring element with stiffness using field

• Material with elastic, plastic, and forming limit models

• Non-spatial field with tabular input

• Material property field with tabular input

• Deformable contact with friction

• Rigid body contact with friction and position control

• Nonlinear static analysis with advanced options for plasticity and elasticity

3

Problem Description

• The cup drawing test simulation with circular punch and blank is one of the most popular tests to verify the planar anisotropic behavior through the prediction of the earing profile. In the cylindrical cup drawing test, the material undergoes compressive deformation in the flange area due to the circumferential contraction. Some stretching occurs also in the radial direction of a cup. This test was simulated for a 6111-T4 aluminum alloy sheet based on the one-point shell element and Barlat's yield function. Also, FLD prediction and drawbead modeling with nonlinear springs were investigated. Assuming isotropic hardening, the yield function coefficients are kept constant during the simulation.

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Summary of Model

Punch with position controlAnalysis Type:

Static analysisLarge strain additive for plasticitySmall strain for elasticity

Die

Holder

Nonlinear spring

Sheet Rigid contact for punch

Rigid contact for holder

Deformable contact

for sheet

Rigid contactfor die

Fixed displacement

for holder

Sheet’s material with:Elastic modelPlastic modelForming limit model

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Modify and Run Session File

a. Locate and open the folder containing session and other files

b. Open .ses file

c. Enter the correct location of the folder and Press Ctrl+S buttons to save the file

d. Click File menu / Select Session / Select Play

e. Select .ses file

f. Click Apply

a

b

c

d

e

f

To run the session file that reads other files, the location specified in the session file must correspond to the actual location of the files.

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Expected Results