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International Journal of Forming Processes
1292-7775
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 ARTICLE VOL 8/1 - 2005  - pp.77-115  - doi:10.3166/ijfp.8.77-115
TITLE
Friction Induced Material Flow to Characterize Lubricating Conditions in Plane Strain Compression Test

ABSTRACT
Plane Strain Compression Tests (PSCTs) were conducted on Aluminium alloy strips with intrinsic physical patterns made of contrast material. Interface friction effects on material flow in compression gap were analyzed both in experiments and in numerical simulations. Numerical simulations were performed using commercially available non-linear FE-code DEFORM. Special physical patterns were produced for experimental purpose and were used in the cold PSC tests on AA6082 strips to map flow along the die-strip interface. Friction effects on material flow are very profound, and were quantified from deformed patterns. On the basis of pattern deformation a new friction formulation was proposed to predict the interface friction by Inverse Parameter Identification (IPI) approach. Experimental friction determination using PSCT was explained and results were discussed. Friction effects on tribological conditions during PSC, for instance contact pressure, and traversed lengths / surface extensions were studied thoroughly in this article.


AUTEUR(S)
Rama Krishna UYYURU, Henry VALBERG

KEYWORDS
plane strain compression test (PSCT), FE-simulations, inverse parameter identification (IPI) approach, material flow, friction measurement, contrast material.

LANGUE DE L'ARTICLE
Anglais

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